Images having a transparent background can be easily stacked ... but once you release the mouse button, the outline disappears. Once the selection is complete, right-click on the selection area.

Seeing Through: Scientists Use Food Dye to Render Mouse Skin Transparent By Ernie Mundell HealthDay Reporter FRIDAY, Sept. 6, 2024 (HealthDay News) -- It seems like a kind of superpower ...

In addition, if you add an Alpha channel to your image, you can remove the area surrounding your selection and replace it with a transparent background ... the left mouse button as you move ...