Longshadow wrote:
It depends on your editor...
On one of mine, I can go to the crop function, set the aspect ratio to (5x7) and crop box orientation (landscape/portrait), lock it, move/adjust the crop box (expand/contract/move) and hit enter. Always "save as" to preserve the original in case you want to do something different later.
EDIT:
Your pixel dimensions are a 1.5 (.6666) aspect ratio, like for 8x12, 4x6, 2x3.
a 5x7 is 1.4 (.7142) aspect ratio. (5x1.4=7)
I think he also wants to change from landscape to portrait (horizontal to vertical) so it would require cropping off more than a little on each end.