Deadlines
Deadlines are a major part of MasterPlan, as they are the primary way in which you are able to impose a time limit on Cards. Any completeable Cards can be assigned one Deadline.
Deadlines are currently set in the View > Edit Menu > "Set Deadline" menu, and viewed in the View > "Deadlines" View. (A consolidation of this into one place seems like a good idea.)
In vertical order, an overdue Card, a Card due today, and a Card due in 3 days
If a deadline is active, it will appear at the left-hand side of the card, flashing when the deadline is up (either due today, or overdue). The text on the deadline itself will also let you know when the deadline is due. You can customize how the deadline displays in MasterPlan's settings section, either setting it to read the number of days left ("Due in 15 days"), the due date ("Due on 06-24-22"), or just an icon.
To set a deadline, you can do so from the Set Deadline option in the Edit menu.
In the Set Deadline menu, you have a calendar indicating the current month. You can advance or roll back the month and year using the corresponding spinners. The reset button to the right of the Year spinner returns the calendar to the current month and year.
The current date in the month will have a darker or lighter background, according to the applied theme - in the above screenshot, it's the 24th. Any selected Cards will display their deadline on the calendar using a small diamond at the top-left corner - in the above screenshot, at least one of the selected Cards has an active deadline on June 27th.
To set the deadline, select one or more cards, select a date, and then click on "Set Deadline". Clicking on "Clear Deadline" will clear the deadline from all selected Cards.
While you can view Deadlines using the calendar in the Set Deadlines menu, there is a dedicated menu from which you can more easily see all active Deadlines project-wide.
The Deadlines view allows you to see any active deadlines in the project. Clicking on the name of a deadline will take you to that active Card - you can also hold the "Add to Selection" key (left shift, by default), to select multiple deadlined cards at the same time. All deadlines listed are in order of severity / due date, with the icon indicating general severity:
: The green icon indicates the deadline is due, but is some time off (at least one day away).
: The yellow icon indicates that the deadline is due today.
: The red icon indicates the deadline is overdue.
: The blue icon (only visible in the Deadlines view) indicates the task has been completed.
As seen above in the first screenshot on this topic, these icons are also visible on the cards themselves when a deadline is applied.