Pausing compilation in GForth

Hello all, 

I am looking for any method to pause compilation, so that it goes on by
smaller chunks and I have the time to examine successes and errors, then
release it for one more screen etc. 

Tried to insert prompts like key, key?, ekey? so that I hit eg the
spacebar or down arrow to release it and run, but that seems to
interfere with the flow, and halt it. 

Idea anyone? 

Thank you very much, 
Paul