WebApp Version
Method 1 :
Drag your mouse over the top left corner of your task then click on the "archive" icon.
Method 2 :
Select the tasks you would like to archive then click on the "archive" icon in the bar at the bottom right of your screen.
Your tasks have been archived
Android Version
Go to your project then long click on the Task you would like to archive.
Select the Tasks you would like to archive, then click the "Archive" button at the bottom of your screen.
Your tasks have been archived
iOS Version
Go to your project in which you want to archive your task.
Drag your task to the left then press the "Delete" button
If you would like to archive multiple tasks at once, you need to:
Click on the Select tab
Select the tasks you would like to archive
Click Delete
Your tasks have been archived