Stroking rotated images

[Kirribilli]

I've rotated (at arbitrary angles) a bunch of images for a collage.
I'm unable to stroke the edges of these tilted images.  I can't select the tilted images themselves, only the rectangular boundaries when they were first placed on the canvas.
Thank you for any help.  I've spent hours trying to solve this.

[Kirribilli]

In addition, everything I try comes up with "not enough points to stroke".

[rich2005]

One way:

You need to increase the layer size to preserve the corners of the rotated graphic (if they are rectangular) . Either Layer -> Layer to Image size or use the crop tool  with options as shown:

   

For any layer: Layer -> Transparency -> Alpha to selection then Edit -> Stroke selection. Uses FG color and you set the line width.

   

[Ofnuts]

(07-13-2019, 10:56 PM)Kirribilli Wrote: I can't select the tilted images themselves, only the rectangular boundaries when they were first placed on the canvas.

Layers are always straight rectangles, but then some pixels can be transparent, so for instance a circle is a square with transparent corners, and likewa for a tilted rectangle.