How to Use fit image in Photoshop
This tutorial will focus on how to use the fit image function within Adobe Photoshop. You will utilize this function when you want the pixel width to match between different sized photos in portrait and landscape. First you will select all the photos (you must create a batch action in Photoshop). Next select the fit image option in the file menu under automate. You will need to put the same number into length and width to constrain the proportions of your landscape and portrait photos have the same longest edge size (around 800 pixels is a common and useful sizing). You can confirm the sizing of any image by going to properties, image size and check to make sure the dimensions of the longest edge are the same size on all your images.