This tip is probably obvious for Mac users, but thought I would post a thread for it, since many of us have problems reading the tiny sized instruments on our larger monitors. Note: I am posting this purely as a temporary fix for Mac users... while we're waiting for Arturia to make the native GUI for their instruments adjustable.
On Mac systems. Go to System Settings and click Enable access for assistive devices. This will allow you to enable Use Keyboard shortcuts to zoom. I use the defaults. With these settings you can zoom in and out of the Arturia instruments with Option-Command-'+' (zoom) and Option-Command-'-' (zoom out). They become second nature if youre doing a lot of tweaking of the instruments.