You might need to integrate contents of the different versions of a file, for example integrate changes of a certain branch into your local copy.

mergingChanges

To integrate changes into your working copy
  1. Select the desired file and compare it with a version.
  2. In the Differences Viewer, use the chevron buttons icon_InsertReplace icon_InsertReplace2 for any block of lines that existed in the read-only copy and were changed or deleted in the local copy. If you keep the key ^ pressed, the chevron buttons turn into arrowLeftDown arrowRightDown. Click these buttons to apply changes to the current local version of the file.