orange dot appears when using rounded rectangle tool [U]

[GDeeb]

This is more curiosity than a bug report, as the end result was OK. AF Photo on Windows 10 system. I was using the rounded rectangle tool on a jpeg, which I then saved as a .png file (to get rid of the square corners). The file saved correctly, but when I moved the base layer on top of the rectangle there was a small orange dot in the upper left corner. That is the same corner I started the rounded rectangle at. The dot did not appear on the saved file but I captured my screen with the snipping tool (see attached image). I'm wondering if that dot might serve some function in Photo. I've never seen this before when using the RR tool.

[walt.farrell]

That's the control node for adjusting the curvature of the corners. It's always there for a rounded rectangle. (Actually, if you uncheck the Context Toolbar option for Single Radius you'd have 4 of them.)

[firstdefence]

...and to add to Walts info you can set different shapes for the corners such as concave, straight (bevel) and cutout. have fun.

[GDeeb]

Thanks walt.farrell and firstdefence. It's strange I never saw this before. I'm going to play around with it as you suggest. Should make for some interest image shapes.