The GUI has large buttons. Click on the + button to the left edge of the window or drag and drop some images onto the GUI. The program supports JPG, GIF, PNG, and BMP formats.
You'll see a preview of the first image that you add in the pane on the right side of the screen. There are several options in the center of the screen, each of which has a box next to it. Check the box to enable the tool, or uncheck to switch it off. Changes that you make are applied to all images. Use the convert option to change the format of an image to one of the above mentioned formats. Enable the resize option and set the width of the image (in pixels).
