The toolbar for the custom screen can be located on the left side instead of the top (settings/dashboard). It has been made easier to activate and will stay visible for 10 seconds.
Multiple screen layouts may be saved and retrieved as follows:
When you hide the instruments they disappear, but the layout is saved. When "unhiding" 4 numbered buttons appear. The current layout is green, the others gray. You can change the layout by selecting a gray button. If there is no layout yet, you will get one instrument only. Set the layout to your liking.
When you close the app, the current layout is saved and will appear when you start it again.