PDMS allows the user to UNDO and REDO commands in DESIGN and DRAFT.
Only since V11.6, and it rarely works as a true “undo” in anything but the MODELEDITOR in DESIGN. I have not had much experience with its use in DRAFT but I have seen it completely UNDO a whole session for one user in DESIGN, not just the last command.
PDMS as with any of the popular 3D modeling programs has its faults and weakness’. I have only ever known PDMS as my last 2 positions have required its use and the firm before could barely issue a P&ID let alone step into the realm of 3D design.
I find PDMS to be very quirky, backwards in progress and yet other times I feel that it’s made my job so simple my 7yr old son could probably keep up with me given the proper training & guidance 