Flipping and resizing
In some cases you may want to change the orientation of a photo. You can do this easily by clicking the Image menu and choosing either Horizontally or Vertically from the Flip Image submenu.
To resize an image, click the Image menu and choose Resize Image. You will then be presented with the Resize Image dialog box. You can resize an image by choosing either a percentage or by choosing the exact pixels.
If you want to make sure that your image resizes without distortion, make sure the Maintain Aspect Ratio checkbox is checked.