Anchor Points

Layer / Mask

You can select either a shape layer or a mask to manipulate the anchor points.

Anchor Point Position

It's pretty self explanatory but you can set the anchor point to the top left, top middle, top right, middle left, middle, middle right, bottom left, bottom middle, bottom right.

The anchor point is bound by the bounding box of the selected layer / layer mask.

Selecting multiple layers will result in all layers of anchor points moving individually

selecting a layer with multiple masks will combine all the masks to a bounding box