Contact sheets let you easily preview groups of images by displaying a series of thumbnail images on a single page.
For Place, choose whether to arrange thumbnails across first (from left to right, then top to bottom) or down first (from top to bottom, then left to right).
Enter the number of columns (between 1 and 9) and rows that you want per contact sheet. The thumbnail size and number of rows adjust according to your choice. If the number of photos exceeds the capacity of a single page, more pages are added to accommodate them.
Use Auto-Spacing to let Photoshop Elements automatically space the thumbnails in the contact sheet. If you deselect Use Auto-Spacing, you can specify the vertical and horizontal space around the thumbnails.