regarding ditigal, Crop Minimally... only if you must
regarding ditigal, Crop Minimally... only if you must
Learn to frame for the final image output. I am frequently surprised by the number of people who shoot with total disregard for the portion of the picture that they want to end up with. Then, in post processing they throw out tons of pixels because "cropping" is so easy and cool. Others have answered the OP question regarding the mechanics, but don't overlook composing the shot for final results.
I addition, your ensuing posts seem to imply that you are looking for a way to "batch crop" all 300 images so that you use the entire captured image to create 8X10 images. I'm not sure that's possible. First, 8X10 as a standard, seems to have been abandoned by the camera, scanner and printer manufacturers insofar as digital is concerned. I think you are faced with treating each image as individual processing to achieve a fixed 8X10 format. I'm sure you can develop a process (formula of processes) that will nearly automate the production of an 8X10 final image size on one image. However, automating a way to apply it to 300 images out of the camera would be a tall order as a batch process.