I am trying to figure out if it is possible to create a circular selection and move it --the selection outline/marching ants, not the image-- so that I can match it onto an image which has a circular object.
I have tried many times to create a circular selection, using Shift to keep it exactly circular, but I can never manage to pick a starting point that makes the circle lay directly on top of the circular object in the image.
I have used some other image editors in the past (forget which one(s) allow it) which allow you to both (a) create a selection box/circle and move that selection thing (layer? marching ants) but without it pulling the picture along. That way I could make sure I got it centered over the circle object in the picture. and (b) allow to grow or enlarge the circular selection so the whole thing grows (radially- gets larger from the center).
I know that Acorn allows to add to a selection, but adding or deleting a ‘chunk’ of pixels to a improperly sized circle is maddening, as the result is no longer circular.
The test case here is an image of a circular object which has a bunch of artsy fading shadow junk underneath it. I am trying to get rid of the shadow below (and which also touches the edges) without having to resort to 1000% magnification and tiny eraser/pencil work…
Maybe its just not possible and I need to use a different graphic tool…
Acorn 6.6.4 OS X 10.12.6 Sierra older iMac.