Axure case: making a round avatar
There are two ways:
The first is that your picture is round in nature, it is actually square, but it is white outside the circle.
Second, you have a square / rectangular picture in your hand
First, paste it into axure and cut it into squares
When this picture is selected, there is a small yellow arrow in the upper left corner. Can you see it? Mouse up, then press and hold and drag to the right. The picture will become rounded
Continue dragging to the middle, it becomes a circle, did you get it?