: How can I shrink these areas using gimp? I have an imagemap. I want to shrink to areas that are pink and are overlays when hovering the mouse over the map to highlight the selected region.

@Sent7350415

My approach would be as follows:


with the selection you have, toggle quick mask mode
run the Erode filter as many times as necessary on that mask


You'll notice that the clear, selected parts of the mask will become smaller.


finally, toggle quick mask mode again to switch back to the selection


You can now either invert the selection and cut the selected parts from the image, or keep the selection as is, create a new layer and fill the selection there.

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@Tiffany317

To scale a selection we can not use the Select > Shrink... tool, as this will only change the dimensions of the selection but not selected area.

To scale a selected image area we can do the following:


Select area to scale.
Create a "floating selection" with Select > Float Shift+Ctrl+L.
Select the floating selection.
Choose the scale tool (Shift+T) to open below dialog from where you can scale by pixel dimensions, metric size, or percentage.
.

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