I hit an annoying trouble using the "Stroke Outline" feature of Photoshop Element 14. I then solved it. So I'll share it here for the benefit of others who encounter the same issue.
"Stroke outline" allows you to do something quite simple: You can colour in the outline of a selection. You can choose the colour, the thickness in pixels, and whether the outline will be inside the selected area, outside, or will centre on the border.