Thank you for the reply. I'm actually attempting to copy an image from a PDF in Preview. I'll provide more detail
Using the rectangular selection tool in Preview I select the image that I want to copy
Once the image is selected:
1) "crop" automatically shows up in the markup toolbar (Crop is not usually present in the markup toolbar)
2) I attempt to copy by command+c or selecting copy in the dropdown with the cursor
The result is that the image I selected is cropped instead of copied. This does not occur 100% of the time. And it does not matter if I use a command function to copy or manually select copy from the dropdown. It's almost as if "copy" functions as "crop" in Preview. This does not happen in other programs.
Hopefully that clears any confusion from my original post.