Draw a zoom area
I found a neat trick to control my zoom when using the magnifying glass for zooming.
Instead of just clicking on the zoom tool enough times to get into the area of the photo you want to work on, here is a neat trick.
Use the magnifying glass to drag and select the area you want to zoom into.
In the example below I drug a box shape around the hat on the straw. Next, I'm instantly zoomed right into that specific area.
How neat is that?!