After you set up the Check In/Check Out system, you can check in and check out files on a remote server using the Files panel or from the Document window.
Check out files using the Files panel
Check in files using the Files panel
Check in an open file from the Document window
Undo a file check-outIf you check out a file, then decide not to edit it (or decide to discard the changes you made), you can undo the check-out operation and the file returns to its original state.
To undo a file check-out, do one of the following:
Open the file in the Document window, then select Site > Undo Check Out.
In the Files panel (Window > Files), right-click (Windows) or Control‑click (Macintosh), then select Undo Check Out.
The local copy of the file becomes read-only, and any changes you’ve made to it are lost.