Thanks for all of the suggestions. This is just a general question, no specific application. There are many times it would be useful to hve a plane halfway between to surfaces, such as between two walls in a room, so you could then have a reference for the center of that room when placing objects in assemblies. I have tried all of these suggestions before, but I was just looking for a simpler way. Having to create additional geometry, or open up the relations screen to do something this basic seems a little over complicated, but hey, that's Pro/E for you. You create planes to serve a support geometry for creating actual entities, so to have to create more support geometry to make it possible to create support geometry is cumbersome.
I spent time working in Inventor, and to create a Datum that would hold midway betweeen two surfaces, all you would have to do is select the "create plane" tool, click the first surface, click the second surface, then click the first surface again, and it would automatically place the plane betweenthe two surfaces. 4 clicks total. This is as opposed to creating more geometry or opening up a new screen to define releations, as you have to do in Pro/E
Releations is another thing that bothers me. When I want to edit a dim, I just double click on the dim and enter in the number or function, and that works great. I would like to able to double click the dim and then enter the relation right there on the screen, using the format "=d1+d2", where the dims d1 and d2 could beentered just by picking those dimensions with your mouse like picking cells in excel. Having to open up a toolbar just to enter a simple relations is, again, overly complicated.
Sometimes Pro/E makes me never want to model again, ever.
