This is handled via MVO (Model View Options). You would need to have separate MVO's configured for your main plan & your electrical plan. Within MVO, for your electrical plans, uncheck "with Marker".
See link below:
https://www.dropbox.com/s/0qurm5wm7hdisec/MVO.jpg?dl=0
iMac 27 (2020) 3.8 GHz Core i7; 128 GB RAM; Radeon Pro 5700 XT 16 GB GPU (macOS Sequoia)
MacBook Pro M1 Max; 64 GB RAM; 32-Core GPU (macOS Sequoia)
ArchiCAD 28/27/26/25 Full (back when Full used to mean Full) (latest builds). User since AC12 (2008).