In order to check in a project select
Ambient > Checkin Project
(alternatively you may press
Ctrl + Alt + S). You will see all
projects in your workspace that are ready to be checked in. Select one project
and click
Finish.
The process will run in the background. You will be informed if your files have not been checked in successfully.
With each checkin, your project files will be tagged with the date. This lets you come back later and undo any incorrect changes you later made. Please be very careful with this function as it will remove your latest code and only let you use the code that you decided to revert to. Use the Undo button on the Ambient toolbar for this functionality.