Unusually for a BATC Project, the Ryde software has been released long before it has been finished. The early releases had very limited functionality but were so useful that it was decided that they should be released. New features are being released in updates about every 2 weeks. A full list of features that are intended to be added to the Ryde software can be found on the GitHub issues list: https://github.com/eclispe/rydeplayer/issues
The main limitation of the current build is that it is not possoble to make permanent changes (ie changes that usrvive a reboot) from the Remote Control menus. However, permanent changes can be made from the "SSH Console Menu".
The SSH Console Menu
To use the SSH Console Menu, log in by ssh and then type menu.
I am losing the edge of the screen off my monitor.
Try adding the line overscan_scale=1 to /boot/config.txt. You will need to use the command sudo nano /boot/config.txt to do this.