The Save With Special Options screen provides additional choices for saving images at customized sizes.  If the current source image is smaller than the screen display, the Save the Original Image Area choice will save only the portion of the screen that the original source image occupies.  Save a Single Tile will save an image with mirroring panels of the current image.  Tiles can be stitched together to form seamless patterns.  The Save a Tiled Image of the Specified Size option allows for creation of an image that is tiled to fill any specified Image Width and Height, optionally with Center Tiles enabled.  The Resolution value that is stored with some image formats can be set to a specified DPI (dots or pixels per inch), though changing the Resolution will not alter the quality of an image. The Large Source Image Save Options portion of the screen is available when the current source image is larger than the screen dimensions (otherwise this area is disabled and grayed).  The Upscale Window can be used to display a full-scale image before saving.