Lots of people "trim out" their windows different than others. What's your preferred way of installing inside window trim?
If installing a window stool instead of the picture frame casing, this is the way I do it. Install the stool first, have it extend beyond the vertical casing at least 1". Install the upper casing as normal. Install the apron, under the sill, with the ends of the apron directly under the outside edge of the casing.
Here is a drawing:
I have drywall return in my own home and did the window stoop and apron like this:
I have round circle head windows in the living room, family room, and foyer and kept that theme with my door casing, as shown here:
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