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.
- Select the desired file and compare it with a version.
- In the Differences Viewer, use the chevron buttons
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 Ctrl
pressed, the chevron buttons turn into 
. Click these buttons to apply changes to the current local version of the file.