1: Click the tab labeled ASSETS in the lefthand menu.
2: Find the file you would like to archive and check the box highlighted below. Click on the blue ACTION button in the top menu.
You can select multiple assets with the checkbox, and archive them all at once.
3: In the drop-down menu, click ARCHIVE. The file is now archived.
4: You can also un-archive a file by clicking the ARCHIVED header. Find the file you wish to recover and click on it.
5: Click the orange ARCHIVED button to recover the file. It will now appear again under the ALL header.