Using Sketch Athens (latest) on Mac Powerbook
If you delete part of a bitmap in Sketch, it removes the unwanted areas - but it still leaves the original bounding box behind - and you can’t delete the empty space.
Makes it really hard to align things when there is the wrong sized bitmap dimensions shown in the inspector.
This will be fixed in the next update — Beta very soon. Until then, you can use Trim Transparent Pixels to trim excess transparency around the image.
I mis-labelled the original post. I called it cropping - but that works fine.
It’s when you edit a bitmap and marquis select an area and press Delete - it deletes the area but it doesn’t trim the bitmap size from the original.
Your suggestion to use Layers>Images>Trim transparent pixels - works! Thanks!