Photostop 2020- How to Round Corners?

[sui347]

Hi, I am new to Photoshop and I am trying to round the corners of a square shape I made. 

I am following along with a tutorial, and the teacher just clicked and dragged from one of the corners and they became rounded. I tried that and my shape just moved around. How do I round the corners? Thanks so much!

[J E L]

Have you been through the instructions here: Draw shapes with the shape tools in Photoshop (adobe.com)

You can modify the radius of all corners of your shape at once or hold Alt (Win) or Option (Mac) as you drag to change the radius of a single corner.

[J E L]

You are looking for the little circle inside the shape frame:

[Semaphoric]

Enhanced Shape Properties is a new feature in Photoshop 2021 — see https://helpx.adobe.com/photoshop/using/whats-new/2021-2.html