Many thanks for the keyboard shortcuts column resizing update Michael, much appreciated. It works fine.

I'll check the viewport refresh rate a.s.a.p.. My machine is currently heavily rendering, which will lag anything right now.

Some other things:

• If I enter a Command key shortcut, such as Cmd + E for export, then the next time I start MoI, the keyboard shortcut has changed to Alt + E, and neither Alt + E nor Command + E works.

• When the Obj export dialog is active, you can't navigate a viewport without exiting the export process. I use viewport navigation a lot when the export dialog is active, to zoom in on objects and check if the polygon detail is sufficient everywhere.