It looks to me like you are adjusting your frame thickness.
If this gets longer than the wall is thick and protrudes, it seems there is no line to the side of the frame.
Don't ask me why - the side of the frame should have a line no matter where it is in my opinion.
Try leaving a standard frame thickness but set a casing to the outside.
This can extend beyond the wall thickness and will show correctly in plan and 3D.
Turn off the option to 'cover the outer wall face' and you will have your window box.
Barry
One of the forum moderators.
Versions 6.5 to 27
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