I sometimes work with 10 or more drawings open. When I need to compare two drawings I tile them with the command "SYSWINDOWS", or pick the option I want from the "Window" pull-down menu. I was wondering if anyone knows how I can make this work better or faster. The way I was imaging it working was: After you start the command a dialog opens up with all the drawings listed (that are open in the current session of acad) with a toggle on the bottom for "Vertical" because I use "Horizontal" more so that would be my default. Then select the drawings that I want to tile. Right now it will tile all the drawings open, and then I have to minimize then ones I don't want to compare. I'm not sure how to do this, and only really need some direction, but if someone has a lisp, why reinvent the wheel. I'm willing to do the work, I'm just stumped where would I find out how to use the command "SYSWINDOWS" to my advantage, or if there is another route I have to take. Thanks for any suggestions, Tim