User Guide

YellowBook is a desktop application for university students who are involved in many projects to organize their project contacts and tasks. As a user of YellowBook, you will be able to:

add contacts
update contact details
add tasks
update task details
track your task completion progress
get task reminders
sort tasks by deadlines
and more!

As YellowBook is optimised for use via a Command Line Interface (CLI), in which all functionality is achieved through typing commands, you will benefit greatly from the use of this application if you are a fast typer.

Read on to find out more about YellowBook’s features!

Table of Contents
Purpose
Quick start
Sample Usage
Icons
Features
Section 1: Contacts
Section 2: Tasks
Section 3: Labels
Section 4: Other Useful Features
Automatic tab switching
YellowBook data
- Saving the data
- Editing the data file
FAQ
Command summary

Purpose

Welcome to YellowBook’s user guide.

If you are a first-time user, this user guide will walk you through setting up YellowBook. The sample usage section will also provide a brief tutorial for you to get familiar with the commands and command formats.

This user guide also provides comprehensive explanations so that you know how to use all the features in YellowBook.

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Quick start

Ensure you have Java 11 or above installed in your Computer. (Installation Guide)
Download the latest yellowbook.jar from here.
Copy the file to the folder you want to use as the home folder for your YellowBook.
Double-click the file to start the app. The GUI, as shown in the image below, should appear in a few seconds. Note how the app contains some sample data.

Fig.1 - App UI
Try out some commands from the Sample Usage section.
Refer to the Features below for details of each command.

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Sample Usage

To better understand the usage of YellowBook, we have provided a usage scenario of YellowBook below. We encourage all first-time users to follow along to gain a general understanding of the commands available.

YellowBook comes with a list of sample contacts and tasks by default.
Let’s start by listing all the contacts in YellowBook. Type listC in the command box and press Enter to execute it. You should see a list of contacts. Try using listT to list all the tasks.

Fig.2 - Result of listC

Fig.3 - Result of listT
Now that you can navigate between the contact and task lists, let’s add a new contact. Type addC n/Elmo p/91238888 e/elmo@sesamestreet.com a/sesame street in the command box and press Enter to execute it. You should see a message indicating that the contact has been added successfully and Elmo will appear in your contact list.

Fig.4 - Result of addC
YellowBook also allows you to add tasks, to add homework task with deadline of 25 December 2022. Type addT d/complete homework D/25-12-2022 in the command box and press Enter to execute it. You should see a message indicating that the task has been added successfully and the task will appear in your task list.

Fig.5 - Result of addT
Now that you know the basic commands, try following the guide for the label command to tag the newly added Elmo contact as friend.
When you feel ready to use YellowBook for your own contacts and tasks, type clear to remove all the sample data from YellowBook.

Fig.6 - Result of clear command
YellowBook’s commands are mnemonically named. A Command Summary with these helpful tips can be found below.

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Icons

Meaning of the icons used:

: Useful information

: Tip

: Warning on incorrect usage

: Caution

Features

Command format:

Words in UPPER_CASE are the parameters to be supplied by the user.
e.g. in add n/NAME, NAME is a parameter which can be used as add n/John.
Items in square brackets are optional.
e.g n/NAME [r/REMARK] can be used as n/John Doe r/friend or as n/John Doe.
Items with … after them can be used multiple times including zero times.
e.g. [t/LABEL]… can be used as (i.e. 0 times), t/friend, t/friend t/family etc.
Parameters can be in any order.
e.g. if the command specifies n/NAME p/PHONE_NUMBER, p/PHONE_NUMBER n/NAME is also acceptable.
If a parameter is expected only once in the command but you specified it multiple times, only the last occurrence of the parameter will be taken.
e.g. if you specify p/12341234 p/56785678, only p/56785678 will be taken.
Extraneous parameters for commands that do not take in parameters (such as listC, listT) will be ignored.
e.g. if the command specifies help 123, it will be interpreted as help.

Section 1: Contacts

These commands allow you to maintain a list of business contacts that you meet for collaborative projects. Whether it be for a school project or an internship, store all their details in one place for easy look-up. Contact management has never been this simple.

Notes on contacts

Contacts have no labels by default.
Contact names are limited to alphanumeric characters and spaces. There must be at least one alphanumeric character.
Contact phone numbers are limited to numeric characters and must be at least three digits long.
Contact emails should be of the format local-part@domain.
The local-part is limited to alphanumeric characters and four special characters “+”, “_”, “.”, and “-“. However, the local-part may not start or end with any special characters.
The domain name consists of domain labels separated by periods, and should end with a domain label at least two characters long. Each domain label should consist of alphanumeric characters, separated only by hyphens, if any. Domain labels must start and end with alphanumeric characters.
Contact addresses can take any values, but must consist of at least one non-space character.
Contact remarks are limited to alphanumeric characters and spaces.

Adding a contact: `addC`

Adds a contact to the contact list.

Format: addC n/NAME p/PHONE_NUMBER e/EMAIL a/ADDRESS [r/REMARK]

There will be an error if you:

Do not adhere to field constraints.
Add a contact that is the same as one already in the address book. Two contacts are the same if they have the same email or phone number.

Example:

addC n/John Doe p/98765432 e/johnd@example.com a/John street, block 123, #01-01
addC n/Betsy Crowe e/betsycrowe@example.com a/Newgate Prison p/1234567 r/Weird person

Listing all contacts: `listC`

Shows all contacts stored in the contact list.

Format: listC

Deleting a contact: `deleteC`

Deletes a contact from the contact list.

Format: deleteC INDEX

Index of a contact is its index number on the currently shown contact list.

There will be an error if you:

Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.

Examples:

listC followed by deleteC 1 deletes the first contact in the address book.
findC n/John followed by deleteC 1 deletes the first result of the findC command.

Editing a contact: `editC`

Edits the information fields (e.g. name, mobile number, email address) of an existing contact in the contact list.

Format: editC INDEX [n/NAME] [p/PHONE] [e/EMAIL] [a/ADDRESS] [r/REMARK]

Index of a contact is its index number on the currently shown contact list.
Input values will replace existing values.

There will be an error if you:

Do not adhere to field constraints.
Edit the contact such that it becomes a duplicate contact to one already in the contact list. Two contacts are the same if they have the same email or phone number.
Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.
Do not provide at least one of the optional fields.

Example:

editC 1 n/John p/12345678 edits the first contact’s name to be John and phone number to be 12345678.

Finding a contact: `findC`

Finds a contact using one or more information fields (e.g. name, phone number, email, address, and/or remark).

Format: findC [n/NAME] [p/PHONE] [e/EMAIL] [a/ADDRESS] [r/REMARK]

The search is case-insensitive, e.g. dr doofenshmirtz will match Dr Doofenshmirtz.
Only full words will be matched, e.g. John will not match Johnny.
Contacts matching at least one keyword will be returned, e.g. n/Perry Dr will match contacts with name Perry the Platypus and Dr Doofenshmirtz.
Successive findC commands are not cumulative, e.g. findC n/John followed by findC n/Doe will return the same result as findC n/Doe.

There will be an error if you:

Do not adhere to the field constraints.
Do not provide at least one optional field.

Examples:

findC n/flynn will return Candace Flynn and Phineas Flynn.
findC n/john p/12345678 e/john@gmail.com a/123 will return contacts with name containing the word john, phone number 12345678, email john@gmail.com, and address containing 123.

Filtering contacts by label: `filterC`

Filters contacts whose label(s) contain any of the given keywords.

Format: filterC KEYWORD [MORE_KEYWORDS]...

The filter is case-sensitive, e.g. cs2103t will not match CS2103T.
Only full words will be matched, e.g. math will not match mathematics.
Successive filterC commands are not cumulative, e.g. filterC cs2101 followed by filterC cs2103t will return the same result as filterC cs2103t.

There will be an error if you:

Do not adhere to label name constraints. Label names must be alphanumeric with no spaces.

Examples:

filterC cs2103t will return contacts with label cs2103t.
filterC cs2103t cs2101 will return contacts with labels cs2103t or cs2101.

Copying contact emails by label: `copyC`

Displays a string of emails of contacts with a label that matches the given keyword for easier copy-pasting.

Format: copyC KEYWORD

copyC is case-sensitive, e.g. CS2103T will not match cs2103t.
Only full words will be matched, e.g. cs2103t will not match cs2103.

There will be an error if you:

Do not adhere to label name constraints. Label names must be alphanumeric with no spaces.

Example:

copyC CS2103T returns a string of emails of contacts that contain the label CS2103T.

*Fig.7 - Result of copyC when applied to contacts with the label "CS2103T"*

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Section 2: Tasks

These commands allow you to maintain a handy to-do list so you can prioritise what needs to be done first. Tasks can be archived once they are completed, so you can keep track of your progress. Monitor your progress, track deadlines and archive tasks with a few simple commands. Leave your task management to YellowBook, so you can do your best work.

Notes on tasks:

Tasks have no labels by default.
Task description should only contain alphanumeric characters and spaces, and it should not be blank.
Task deadline must be in the format dd-mm-yyyy, e.g. 25-12-2022.

Adding a task: `addT`

Adds a task to the task list.

Format: addT d/DESCRIPTION D/DEADLINE

Newly added tasks are marked as not done by default.
Tasks that are past their deadline can still be added since overdue tasks might have to be completed still.

There will be an error if you:

Add a task that is the same as one already in the address book. Two tasks are the same if they have the same description, deadline and labels.
Do not adhere to field constraints.

Example:

addT d/buy milk D/12-09-2022 will add the task “buy milk” with deadline 12 September 2022.

Listing all non-archived tasks: `listT`

Shows all (non-archived) tasks stored in the task list.

Format: listT

Newly added tasks are marked as unarchived by default.

Archived tasks can be viewed using the listAT command.
Task can be archived using the archiveT command.

Listing all archived tasks: `listAT`

Shows all archived tasks stored in the task list.

Format: listAT

Unarchived tasks can be viewed using the listT command.
Task can be unarchived using the unarchiveT command.

Deleting a task: `deleteT`

Deletes a task from the task list.

Format: deleteT INDEX

Index of a task is its index number on the currently shown task list.
INDEX must be a positive integer more than 0.

There will be an error if you:

Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.

Examples:

listT followed by deleteT 1 deletes the first task in the task list.
findT d/book followed by deleteT 1 deletes the first result of the findT command.

Editing a task: `editT`

Edits the information fields (e.g. description, deadline) of an existing task in the task list.

Format: editT INDEX [d/DESCRIPTION] [D/DEADLINE]

Index of a task is its index number on the currently shown task list.
Input values will replace existing values.

There will be an error if you:

Do not adhere to field constraints.
Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.
Do not provide at least one of the optional fields.
Edit the task such that it becomes a duplicate task to one already in the task list. Two tasks are the same if they have the same description, deadline and labels.

Example:

editT 1 d/sleep D/22-10-2022 edits the first task’s description to be “sleep” and deadline to be 22-10-2022.

Finding a task: `findT`

Finds tasks using one or more information fields (e.g. description, deadline, and/or completion status).

Format: findT [d/DESCRIPTION] [D/DEADLINE] [s/STATUS]

Task status must be either complete or incomplete.
Both archived and unarchived tasks containing the search terms will be displayed.
The search is case-insensitive, e.g. homework will match HOMEWORK.
Only full words will be matched, e.g. math will not match mathematics.
Task descriptions matching at least one keyword will be returned, e.g. d/cs2103t cs2101 will match cs2103t tutorial and cs2101 reflection.
Successive findT commands are not cumulative, e.g. findT d/math followed by findT d/homework will return the same result as findT n/homework.

There will be an error if you:

Do not adhere to the field constraints.
Do not provide at least one optional field.

Examples:

findT s/incomplete will return tasks that are not complete.
findT d/cs2103t D/25-12-2022 s/complete will return tasks with descriptions containing cs2103t, deadline 25th December 2022, and completion status complete.

Filtering tasks by label: `filterT`

Filters tasks whose label(s) contain any of the given keywords.

Format: filterT KEYWORD [MORE_KEYWORDS]...

Both archived and unarchived tasks containing specified labels will be displayed.
The filter is case-sensitive, e.g. cs2103t will not match CS2103T.
Only full words will be matched, e.g. math will not match mathematics.
Successive filterT commands are not cumulative, e.g. filterT cs2103t followed by filterT math will return the same result as filterT math.

There will be an error if you:

Do not adhere to label name constraints. Label names must be alphanumeric with no spaces.

Examples:

filterT cs2103t will return tasks with label cs2103t.
filterT cs2103t cs2101 will return tasks with labels cs2103t or cs2101.

Marking a task as complete: `markT`

Marks a task in the task list as complete.

Format: markT INDEX

Index of a task is its index number on the currently shown task list.

There will be an error if you:

Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.

Examples:

listT followed by markT 1 marks the first task in the displayed task list as done.
findT d/book followed by markT 1 marks the first result of the findT command as done.

Marking a task as incomplete: `unmarkT`

Marks a task in the task list as incomplete.

Format: unmarkT INDEX

Index of a task is its index number on the currently shown task list.

There will be an error if you:

Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.

Examples:

listT followed by unmarkT 1 marks the first task in the displayed task list as undone.
findT d/book followed by unmarkT 1 marks the first result of the findT command as undone.

Archiving a task: `archiveT`

Archives a task in the displayed task list, removing it from main (unarchived) task list.

Format: archiveT INDEX

Archived task list will be displayed after executing this command.

There will be an error if you:

Enter 0 or a negative number as INDEX.
Enter a number greater than the size of displayed task list as INDEX.

Examples:

listT followed by archiveT 1 archives the first task in the displayed task list.
findT d/book followed by archiveT 1 archives the first result of the findT command.

Unarchiving a task: `unarchiveT`

Unarchives a task in the displayed task list, adding it to the main (unarchived) task list.

Format: unarchiveT INDEX

Main (unarchived) task list will be displayed after executing this command.

There will be an error if you:

Enter 0 or a negative number as INDEX.
Enter a number greater than the size of displayed task list as INDEX.

Examples:

listAT followed by unarchiveT 1 unarchives the first task in the displayed task list.
findT d/book followed by unarchiveT 1 unarchives the first result of the findT command.

Listing tasks with deadlines up to and including the specified date: `remindT`

Lists tasks in task list with deadlines up to and including the specified date.

Format: remindT DEADLINE

Both completed and incomplete tasks are listed.
Task with deadlines that are already past are also listed.

Tasks that are complete are also listed so users are reminded to delete or archive them.

There will be an error if you:

Do not adhere to deadline constraints. Deadline must be in dd-mm-yyyy format.

Example:

remindT 12-09-2022 will list all tasks with deadlines up to and including 12-09-2022.

*Fig.10 - Result of remindT when only one task is on 12-09-2022 or earlier*

Showing the percentage of tasks with the specified tags that are completed: `progressT`

Shows the percentage of tasks whose label(s) contain any of the given keywords that are complete to one decimal place of accuracy.

Format: progressT KEYWORD [MORE_KEYWORDS]…

The filter is case-sensitive, e.g. cs2103t will not match CS2103T.
Only full words will be matched. e.g. cs2103t will not match cs2103.
Tasks with labels matching at least one keyword will be returned.
Both complete and incomplete tasks are listed.
Both archived and unarchived tasks are listed.
Tasks with deadlines that are already past are also listed.

There will be an error if you:

Do not adhere to label name constraints. Label names must be alphanumeric with no spaces.

Example:

progressT cs2103t will show the percentage of tasks with label cs2103t that are completed, then list all tasks with labels matching at least one keyword.

*Fig.11 - Result of progressT where only one of two GEA1000 tasks has been completed*

Sorting all tasks by deadline: `sortD`

Sorts all tasks in the task list by deadline.

Format: sortD

Adding or editing a task will not affect the sorted order of the task list.
The list remains in this sorted order until a different sort command is used.

Sorting all tasks by id: `sortI`

Sorts all tasks in the task list by id.

Format: sortI

Id is the order in which the tasks were added.
Adding or editing a task will not affect the sorted order of the task list.
The list remains in this sorted order until a different sort command is used.

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Section 3: Labels

These commands allow you to further organise people and tasks into subgroups depending on the nature of the project you are working on together. Whether it be a software engineering module or a business pitch, you can customise every person and task. With our label feature, managing your numerous projects on the go has just gotten a lot easier.

Notes on labels:

Labels must be alphanumeric and one word long.
Labels used in commands are case-sensitive. e.g. CS2103T is different from cs2103t.

Adding a label to a contact/task: `addL`

Adds a label to an existing contact/task in YellowBook. At the same time, the label is added to the label list, shown under the “tags” tab of the app. This list is unique, meaning each label with a distinct name is only shown once, even if more than one contact/task has the same label.

Format: addL c/INDEX t/INDEX l/label_NAME

Index of a contact is its index number on the currently shown contact list.
Index of a task is its index number on the currently shown task list.

There will be an error if you:

Do not adhere to the field constraints.
Specify more than one contact or more than one task.
Try to delete a label from a contact or task that does not have it.
Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.

Example:

addL c/3 t/12 l/CS2103T will add the label “CS2103T” to the 3rd contact on the contact list and 12th task on the task list.

Listing all labels: `listL`

Shows all labels stored in the label list.

Format: listL

Deleting a label from a contact/task: `deleteL`

Deletes a label from an existing contact/task in YellowBook.

If contact/task is last remaining contact/task with said label, label is deleted from the label list. Otherwise, it is only deleted from the specified contact/task label list.

Format: deleteL c/INDEX t/INDEX l/label_NAME

Index of a contact is its index number on the currently shown contact list.
Index of a task is its index number on the currently shown task list.

There will be an error if you:

Do not adhere to the field constraints.
Specify more than one contact or more than one task.
Try to add a label to a contact or task that already has it.
Enter 0 or a negative number as INDEX.
Enter a number greater than the currently shown list size as INDEX.

Example:

deleteL c/12 t/14 l/CS2101 will remove the label “CS2101” from the 12th contact on the contact list and 14th task on the task list.

Deleting all contacts and tasks by label: `deleteA`

Deletes all contacts and tasks that contain the label(s) specified. The label is also deleted.

Format: deleteA LABEL_NAME [MORE_LABEL_NAMES]...

If a contact/task has multiple labels, it will not be deleted as long as it has at least one label. Instead, the labels will be removed from the contact/task.

There will be an error if you:

Do not adhere to the field constraints.
Try to delete a label that does not exist.

*Fig.14 - Result of deleteA when applied to all contacts/tasks from GEA1000*

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Section 4: Other Useful Features

Viewing help: `help`

Shows a window with a link to this user guide and latest release of YellowBook.

Format: help

Undoing a command: `undo`

Undoes the last command.

Format: undo

For exceptionally large contact/task lists, it may take a few seconds to undo the command.
Undo is not available for commands that do not modify the contact/task data (e.g. listC, listT, help, findC, findT, filterC, filterT etc.)

Redoing a command: `redo`

Redoes the last command.

Format: redo

For exceptionally large contact/task lists, it may take a few seconds to redo the command.
Redo is not available for commands that do not modify the contact/task data (e.g. listC, listT, help, findC, findT, filterC, filterT etc.)

Clearing YellowBook data: `clear`

Clears all data from YellowBook.

Format: clear

Exiting YellowBook: `exit`

Closes the YellowBook program.

Format: exit

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Automatic tab switching

Depending on the command you enter, you will see the open tab in the GUI switch automatically. For example, when using a task-related command, the tab switches to “Task” and the task list is displayed.

The result of the entered command is displayed. For example, after adding a new contact, the list shown on the GUI is the updated list with your new contact included.

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YellowBook data

Saving the data

YellowBook data are saved in the hard disk automatically after any command that changes the data. There is no need to save manually.

Editing the data file

YellowBook data are saved as a JSON file [JAR file location]/data/yellowbook.json. You are strongly encouraged to use the YellowBook application’s commands rather than edit the data file directly as there may be invalid data entered.

Advanced users who wish to edit the data file should note the following:

Id field of a Contact is unique and should comply with the string representation of Java UUID
Id field of a Task is unique and should be an number greater than zero
Fields for Contacts, Tasks and Labels should comply with the respective field constraints.

If your changes to the data file makes its format invalid, YellowBook will discard all data and start with an empty data file at the next run.

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FAQ

Q: How do I transfer my data to another computer?
A: Install the app in the other computer and overwrite the empty data file it creates with the file that contains the data of your previous YellowBook home folder.

Q: My contact’s full name includes special characters (e.g. s/o). Why can’t I add it?
A: YellowBook does not currently support special characters in names as it is not a critical feature for students managing their project contacts. We will be adding support for special characters in future versions.

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Command summary

Command	Mnemonic	Format, Examples
help	-	`help`
undo	-	`undo`
redo	-	`redo`
clear	-	`clear`
exit	-	`exit`
listC	list Contact	`listC`
addC	add Contact	`addC n/NAME p/PHONE_NUMBER e/EMAIL a/ADDRESS [r/REMARK]` e.g., `addC n/John Doe p/98765432 e/johnd@example.com a/John street, block 123, #01-01`
deleteC	delete Contact	`deleteC INDEX` e.g., `deleteC 1`
editC	edit Contact	`editC INDEX [n/NAME] [p/PHONE] [e/EMAIL] [a/ADDRESS] [r/REMARK]` e.g., `editC 1 n/John p/12345678`
findC	find Contact	`findC [n/NAME] [p/PHONE] [e/EMAIL] [a/ADDRESS] [r/REMARK]` e.g., `findC n/Ferb`
filterC	filter Contact	`filterC KEYWORD [MORE_KEYWORDS]` e.g., `filterC cs2103t`
copyC	copy Contact emails	`copyC KEYWORD` e.g. `copyC CS2103T`
listT	list Tasks	`listT`
listAT	list Archived Tasks	`listAT`
addT	add Task	`addT d/DESCRIPTION D/DEADLINE` e.g., `addT d/buy milk D/12-09-2022`
deleteT	delete Tasks	`deleteT INDEX` e.g., `deleteT 12`
editT	edit Tasks	`editT INDEX [d/DESCRIPTION] [D/DEADLINE]` e.g., `editT 1 d/sleep D/22-10-2022`
markT	mark Task as completed	`markT INDEX` e.g., `markT 1`
unmarkT	unmark Task as not completed	`unmarkT INDEX` e.g., `unmarkT 1`
archiveT	archive Task	`archiveT INDEX` e.g., `archiveT 1`
unarchiveT	unarchive Task	`unarchiveT INDEX` e.g., `unarchiveT 1`
findT	find Tasks	`findT [d/DESCRIPTION] [D/DEADLINE] [s/STATUS]` e.g., `findT d/homework`
filterT	filter Tasks	`filterT KEYWORD [MORE_KEYWORDS]` e.g., `filterT cs2103t`
remindT	remind Tasks due on/before certain date	`remindT DEADLINE` e.g., `remindT 12-09-2022`
progressT	progress of Task with label	`progressT KEYWORD [MORE_KEYWORDS]` e.g., `progressT cs2103t`
sortD	sort by Deadline	`sortD`
sortI	sort by Id	`sortI`
listL	list Labels	`listL`
addL	add Label to contact or task	`addL c/INDEX l/LABEL_NAME [l/MORE_LABELS]` OR `addL t/INDEX l/LABEL_NAME [l/MORE_LABELS]` OR `addL c/INDEX t/INDEX l/LABEL_NAME [l/MORE_LABELS]` e.g., `addL c/3 t/12 l/CS2103T`
deleteL	delete Label from contact or task	`deleteL c/INDEX l/LABEL_NAME [l/MORE_LABELS]` OR `deleteL t/INDEX l/LABEL_NAME [l/MORE_LABELS]` OR `deleteL c/INDEX t/INDEX l/LABEL_NAME [l/MORE_LABELS]` e.g., `deleteL c/12 t/14 l/CS2101`
deleteA	delete All contact(s)/task(s) with tag	`deleteA LABEL_NAME [MORE_LABEL_NAMES]` e.g., `deleteA cs2103t`

[Back to Table of Contents]

Table of Contents

Purpose

Quick start

Sample Usage

Icons

Features

Section 1: Contacts

Adding a contact: addC

Listing all contacts: listC

Deleting a contact: deleteC

Editing a contact: editC

Finding a contact: findC

Filtering contacts by label: filterC

Copying contact emails by label: copyC

Section 2: Tasks

Adding a task: addT

Listing all non-archived tasks: listT

Listing all archived tasks: listAT

Deleting a task: deleteT

Editing a task: editT

Finding a task: findT

Filtering tasks by label: filterT

Marking a task as complete: markT

Marking a task as incomplete: unmarkT

Archiving a task: archiveT

Unarchiving a task: unarchiveT

Listing tasks with deadlines up to and including the specified date: remindT

Showing the percentage of tasks with the specified tags that are completed: progressT

Sorting all tasks by deadline: sortD

Sorting all tasks by id: sortI

Section 3: Labels

Adding a label to a contact/task: addL

Listing all labels: listL

Deleting a label from a contact/task: deleteL

Deleting all contacts and tasks by label: deleteA

Section 4: Other Useful Features

Viewing help: help

Undoing a command: undo

Redoing a command: redo

Clearing YellowBook data: clear

Exiting YellowBook: exit

Automatic tab switching

YellowBook data

Saving the data

Editing the data file

FAQ

Command summary

Adding a contact: `addC`

Listing all contacts: `listC`

Deleting a contact: `deleteC`

Editing a contact: `editC`

Finding a contact: `findC`

Filtering contacts by label: `filterC`

Copying contact emails by label: `copyC`

Adding a task: `addT`

Listing all non-archived tasks: `listT`

Listing all archived tasks: `listAT`

Deleting a task: `deleteT`

Editing a task: `editT`

Finding a task: `findT`

Filtering tasks by label: `filterT`

Marking a task as complete: `markT`

Marking a task as incomplete: `unmarkT`

Archiving a task: `archiveT`

Unarchiving a task: `unarchiveT`

Listing tasks with deadlines up to and including the specified date: `remindT`

Showing the percentage of tasks with the specified tags that are completed: `progressT`

Sorting all tasks by deadline: `sortD`

Sorting all tasks by id: `sortI`

Adding a label to a contact/task: `addL`

Listing all labels: `listL`

Deleting a label from a contact/task: `deleteL`

Deleting all contacts and tasks by label: `deleteA`

Viewing help: `help`

Undoing a command: `undo`

Redoing a command: `redo`

Clearing YellowBook data: `clear`

Exiting YellowBook: `exit`