How can I add style options to my custom module, so I can add margin top, bottom, left,right in my landing page for wanted module? Also how can I get option to edit in expanded view, like changing font, bold text, etc on my module?
Thanks for your time! 
Hi @dobradovic ,
If you are looking in the Design Manager, you should see a pane dedicated to CSS styles. Please see screenshot.
As for the second question, I am unclear of what you are needing 
Hey, tnx. For second question I want to add customization like there is for rich text for example(screenshot). I mean this tab with Advanced > source code feature. How to add this to custom module? Tnx
Hi @dobradovic
The only way I can think to add that is to add a rich text editor in your custom module. I may not be 100% following what your end goal is, though