Modifications results are shown in the Commit tool window Alt+0. See File Status Highlights for file status highlighting conventions. The files in the folders under the Mercurial control are highlighted according to their status.
When Mercurial integration with GoLand is enabled, the Mercurial item appears in the VCS menu, and in the context menus of the editor and Project tool window. You can access the remote repository through a pair of ssh keys or apply the username/password and keyboard interactive authentication methods supported by the Mercurial integration. If you want to use a remote repository, create a Mercurial hosting account first. Mercurial integration is enabled for the current project root or directory. In this case, you can specify only the executable name, the full path to the executable location is not required.
It is recommended that you add the path to the Mercurial executable file to the PATH variable. If you followed the standard installation procedure, the default location is /opt/local/bin or /usr/local/bin for Linux and macOS and /Program Files/TortoiseHG for Windows. The location of the Mercurial executable file hg.exe is correctly specified on the Mercurial page of the Settings/Preferences dialog.