Symbols disappear when printing

[modulor]

V7.0 demo, Newbie.
I created an electrical legend with switches, outlets etc.
Didn't want to see host-walls so turned off wall visibility.
The symbols display fine on screen, but disappear on print or print-preview.
They do print with walls turned back on however.

Also, I created some 2d free-instance ceiling light symbols to place on the floor plan. When printing, Some show up, some disappear. Look at the master bathroom area.

[adegnan]

Check your underlay settings. Do you have a plan underlay that makes things show up on screen? And what about view range?

[modulor]

I found that I need to check "Raster Processing" in the print dialogue and everything shows up fine.
Erik