ProMods

Hello,
I'm using ProMods+ETS2 Map Editor to make add more things to the map, I want to make my own signs for the polish highway, streets, etc. and I made a few board templates and saved them and they saved as an .SII file. How do I use my templates turn them into an in-game sign? I've been trying to figure out for hours how to make a sign with my template. Please Help

Sign board templates need to be applied to sign models in order to create sign templates (placeable on the map). In 'Create template' mode, choose the board template you want to apply in the Template properties box in the top right corner.
MandelSoft's sign editor tutorial