Android : How can multiple files be committed to git repository with c4droid?

I'm trying to get familiar with c4droid at the moment. So far I didn't manage to find any dedicated forum, tutorial or manual for this android app, so it's a hard way of getting the hang of it.

I've set up c4droid so that I'm successfully able to commit single files to my git repository. I do this by a long press on the tab header displaying the file name in the editor component until a dialog is shown which asks for a commit description. However using this approach I have to commit each files separately which I don't want, because 1. it's not convenient and 2. it destroys the internal relationship of an actual commit.

Does anyone know how multiple files can be committed from c4droid with a single commit only?