It is not there that I could see either.
The only reason I can think of is because the door has a wider frame around it than the sidelight/window and then bottom is higher still.
However they can fit the standard horizontal/vertical grid in a door, so why not the editable one as well.
You can always create a custom door panel from slabs with the pattern you want, but it still won't be editable of course.
Barry.
One of the forum moderators.
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