The only way to change the backgroun dcode it's with INLINE but from this you have to use C++.
IF you press CRTL+SHIFT and F you can find in all the Documents at the same time , a Command or any word.
If you want make a comment in the middle of a line try something like this
somecode ; //MY commments// ; this will be the next - Line...
OR
somecode , _ // MY Commnts
not the line continue here down...
Remenber when you use _ it's a carry out to the next line, but if you are doing something with parameters like a function don't forget put before the "comma" , and after the _ Symbols...