Greetings,

I have another question about cropping in photoshop. 

Suppose, for example, that my objective is to create an 8X10 image.  ... and that after the crop operation, I will be able to resize the image to get the exact 8X10.  Assume for this example that there will be enough pixels ... or I can choose a reduced dpi for printing. 

What I would like to be able to do is to preset the crop to a specific aspect ratio (i.e. not necessarily a specific size) ... then as I drag the crop within the image, that aspect ratio (in this example, 8X10) would be maintained ... specifically, if I pull the lower right crop corner down, the left crop line would also move to maintain the chosen aspect ratio. 

What I'm thinking of is similar to the previsualization trick of looking at the scene through a frame.  Ansel Adams wrote, "11. Exploring with black cut-out card ... The card suggests possible compositions, creating 'configurations out of chaos' ... ".  Ansel Adams; "Camera and Lens"; ISBN 0-87100-056-3; pp 27 - 29, Figure 11.

So ... my Photoshop question ... Can the aspect ratio be preset? 

Thanks for any advice ...

--
Martin