Below is how many people make a +/-15V split-supply in LTspice:
But this takes too much time each time to select 3 components GND and give them values one by one ect, etc.
So I was wondering if there is a way to copy this topology as a single symbol or create one in LTspice from scratch. The idea is to select a split-supply directly from its own symbol. Does anyone have experience with that? I saw some tutorials how to make symbols but they were about opampsop-amps.