Border influence to window size

Vision 8.1.38

I searched and couldn't find an answer. Hopefully not a dumb question.....

When applying a border to a floating window, is the window size maintained and the border is within the perimeter boundary, or does the window size expand outward the width of the border?

The reason I ask Is I had a floating window inside a north and south docked window. Everything is developed to native resolution. I kept noticing on one window, a circle and rectangle that were aligned in designer, were ever so off in the client. By maybe a pixel. I realized that I had not set the border on that window to never. Once I changed it to never, the client view was perfectly aligned and matched my designer. So, apparently, Ignition was scaling the floating window every so slightly? I have all widget layouts to relative, maintain aspect unchecked.

The only time I usually use window borders is for popups, so never considered the effect on the overall size of a static window. I had assumed, maybe wrongly, that the size was the size, with the border included. But the above scenario seems to disprove this. Or is something else going on?