And the answer is not to use openjdk 21 but instead to revert to something like 11. Solved

I should have said, I'm using sway

Hi,

I've recently installed sweethome3d 7.2 on archlinux (6.6.8-arch1-1).

When I open the application, the 4 standard panes do not fill the window (see https://imgur.com/a/HOcfagV ) and there's no obvious way to make this happen. Any ideas what I need to do?

Cheers all (and happy Christmas ...