Guau!!! 
I have tried to answer some questions, but I deleted the comment because it is already answered.Just answer your question 27.This may change in the future.For the moment read this thread:https://forum.renoise.com/t/any-way-to-change-the-size-of-fonts/46948
It would be a good start to read the official manualhttp://tutorials.renoise.com/wiki/Main_Page in depth while testing things, also the video tutorials.
Congratulations on learning Renoise! It is excellent software!