[plt-scheme] UI questions

I'm sorry if this is obvious to everyone but me. When I hit Check 
Syntax, and the colours change, how do I restore them without doing 
anything? I know I can edit the file, or hit Run, but what if I don't 
want to do these things?

Another question: why is "cond-like, skip 1" not the default for 
square-bracket handling for `match'? I know how to set it in 
Preferences, but surely I shouldn't have to now that it is provided from 
scheme, like provide/contract (which is handled properly). --PR