How do I change the text size on the screen?

I am new to the IoT development and to Onion . Can someone give me a project to try and build on the Omega? I have the Omega and expansion dock , Oled and just want a pointer to where to start. I have been working on a Respberry Pi for a bit and have led's, sound sensors, Oled's etc and looking for an idea to start on.

@Boken-Lin Thank you

@Boken-Lin Thanks

@Boken-Lin Did you post the diagram yet?