How to create a custom shape

[Robintes]

As a noob a while back I was trying to create a block (shape?) for a DPDT relay and quickly found myself getting screwed up with the intrinsic grid snapping thing - and its subdivisions. I had problems getting a circle to fit - probably should use this, a square would do. for terminals connections. I enclose a drawio for comment on my poor attempt. whats the best way to create a usable blocks thats maybe useful to donate to the user library for common purpose
relay dpdt.xls

btw i had to change the file from .drawio to .xls i to paste here hope thats correct