nostalgic feeling doing detail drawings

We don't have any issues with loading multiple drawings into memory. A lot depends on how much memory your computer and graphics card have. I have had about 15-18 loaded before the system complains and says no more can be loaded. We are on Creo 9.

If you are linked to Windchill you can (from the active Workspace) select multiple models and or drawings and then File > Open In > Creo.

Don't know if it's been a Creo thing, or a result of the changes to Windows over the intervening years. Since pretty much every program, including Creo, uses the Microsoft based file opening dialog, I'd suspect it's more of a windows thing than something PTC has done.

The <Ctrl>-Select doesn't work in Word or Excel to select multiple files to open, but using a selection rectangle to pick multiple files does.

Creo doesn't allow the "rectangle select" method, either.