I’ve got a half round window to put over a pair of matching french doors with mullions and centred in a gable. To get this working with Plusspec tools would be mixing up the door and window tools.
I’ll model the half round window in Sketchup this time and BIM it later but is it possible with Plusspec?
I would recommend using the Arch Window type (as per screenshot)
So whatever the width of your window (for example 1000 mm) your height & top height will be half that measurement (500mm) then press Submit in your dialog.
You will be able to acheive a half circle window.