i startet to try Sencha Touch and Designer 2 some Days ago.
So far, i don't really understand the workflow.

I have to create an app that don't really looks like a standard app. How can i extend the layout in Designer? Can i extend my Designer-Project by a custom CSS an own IconClasses?

Sometimes, when i use helper tools like Designer, i prefer to make changes directly in the code, rather than searching for the Place to do it in the tool (if it is possible). Can i use a text editor to make changes directly in the code?

Sorry for my bad English an if this Questions eventually are a bit stupid.
It's hard for me to learn this concept in a Language i don't really use very often.