Can one request change several drawings at once?

Yes, for drawings in the same project. Below the request box, open Also run on other drawings and tick the ones you want. Each drawing runs as its own job and uses usage the same way a separate request would. Its result appears in that drawing's own thread, so select it in the Files column to see it (in Guided mode, pick it from the drawing menu in the request box), and with Email when done on you get an email for each one. If one of the drawings can't run, for example because it's still uploading or your plan doesn't have enough usage left for all of them, nothing is submitted and AutoMEP tells you which drawing stopped it. On the Pro and Team plans, with Build on the last result ticked, each drawing builds on its own last result. Each drawing is planned on its own, so write a request that makes sense on every one of them, such as adding supply ducts to every room on the floor. AutoMEP doesn't yet line up work between levels, like a riser that has to land in the same spot on two floors, so check those connections yourself. Guided mode has the same Also run on other drawings list under its request box, and it works the same way.