The Check In Item action allows you to create a new revision of changed items.
First of all switch to the Workspace page and select the workspace which you want to perform the check in on (this field can be populated with the default workspace if you have specified one on the options page).
Next, choose the items to check in to the selected workspace from the Check In Items page. Add the files and directories via the controls provided.
Items that have been added to the list can be edited and removed with the corresponding controls.
There are also two options available for this action:
Do not check file content (forced) - Revision will be created even if changes have not been made since the last revision.
Recursive - Perform a recursive check in.