This is for BobZ’s question from another post but to avoid polution, I’ll put it in this post
Bob mentioned he wasnt familiar with Altium’s stacked commands :
(from )
BobZ, Maybe I can elaborate, If you are placing a trace, maybe you are half way between your A and B, and suddently decide you want to place a via on the other side of the pcb, you can place-via (P V) and what you were doing goes onto the ’ stack ’ you go into place via mode , go and place as many vias as you wanted to, maybe place string (P S) to place a text string, then ESC now you are back to placing vias mode, then ESC now you resume exactly where you left off placing that trace.