@Stefan Schippers xschem bus notation is extremely useful (https://xschem.sourceforge.io/stefan/xschem_man/tutorial_busses.html) But how to use the special ground pin (0) in the bus notation? i.e., I want my bus to be "RST,8*0", where 0 is repeated 8 times. It seems this syntax is not supported. How to do it properly?

use this:

"RST_BUS;RST,0,0,0,0,0,0,0,0"

I will investigate if it is easy to allow the xschem bus notation also for bus signals in graphs. As of now this is not handled.

Thanks @Stefan Schippers I used the trick below: V1 VLOW 0 0 Then RST,8*VLOW Worked well :)