I found that I can do this using Modify Rooms in online v6.6 of SH3...
This feature does not seem to work in locally installed v6.6 of the programme.

Hi,
i found how to do this.

( I'd been looking for a specific dimensions setting but then realised that the standard icon to inc/dec font size would work)

Hi,

new user here!

Enjoying using SweetHome 6.2 on Linux Mint 20.1.

When I create a room, the default fill is dark grey; how do change this to "no fill" ( I have tried "painting the floor with no fill" but that didn't seem to work.

Can anyone help please?

Hi,

new user here!

Enjoying using SweetHome 6.2 on Linux Mint 20.1.

Cannot see how to increase size of dimension font?

Can anyone help please?