Hello, you can hide the ceiling molding/baseboard of the entire house as needed; but if you want to change the style and material, you can only set it room by room. The specific operations are as follows:

1. Show/hide the ceiling molding/skirting line(AKA toe kick) for the entire house type; (Note: If it is gray and not selectable here, you need to set it in Tools - Settings - Global Settings before you can continue the operation)

2. To hide or change the style/material of the top molding or toe kick(skirting line) in a single space, you need to switch to 2D mode and click the room with the mouse to make the modification.