I have done this many times. My standard method is to open the image, select and ⌘C ⅓ of the text with a rectangle - just eyeballing the three parts. Then I open a new tab with the contents of the clipboard
and ⌘V then go back to the original tab and select the second column of text go back to the 2nd tab and paste - you will have to correct cropping for two more columns. Then repeat that for the third column. This has the advantage of keeping the original image intact - to make changes as needed - and have your three column image - after you save it.

Statistics: Posted by mccoytest — Yesterday 20:16:32