Is there a way to reduce the diameter of the eraser circle? At times it is too large for the imperfection that requires removal.
Use the adjustment slider.
Yes, but I can’t post a screen shot as I’m not at my desktop PC so try this tutorial by @Pieloe:
Found the slider that reduces the diameter area of the eraser.
(If you’re a Windows user), while the Eraser tool is active, you can hold the Ctrl-key and scroll the mouse-button to change Eraser size … I’m not sure if the Mac version has similar capability (?)