When I right-click on a 387x387 Matrix my pointer turns into a processing indicator and the system sits endlessly.  Other than killing the maple server process is there a way I can instruct Maple to cancel processing and make it responsive again?

I have been using "Document Mode" in Maple 11 for the majority of my work.  I find that coding procedures and loops is stylistically different than the rest of my document content.  It is a bit uncomfortable using SHIFT+ENTER and struggling with manual indentation in the procedure and loop blocks.

What is the best editing mode for coding routines?