Can you make debugger area movable? collapsible? It overlaps data sometimes which is very inconvenient. Maybe show it in dhtmlxWindow?

Yep, usability of current implementation is far from the best, we will check how it can be improved.

With current version, you can just close it ( link at the top ) and use ctrl-dblclick anywhere to show it again ( it doesn’t solve all problems, but makes it a bit more usable )

Nope, does not work, but do not bother.
I think it is even better idea to make it always awailable throug a link that can be placed on a page (like “add row” for example).