GIMP Version: 2.8.14
Operating System: Windows
OS Version: 10
GIMP Experience: New User

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Hello, I am new to this site.

There doesn't seem to be an option to select the outline of an image against a transparent background. Gimp automatically outlines the image when resizing a selection, but it creates a floating layer, which is not helpful as I intend to use the "shrink" functionality on the selection.

Any help would be greatly appreciated!

Layer>Transparency>Alpha to selection.

But if you want to change something without spilling on the transparency, don't use that, use the Alpha-lock on the layer.

Thank you so much!