This chapter covers the details of editing images and the elements you can add to your images and animated Xplains. If you just want to edit single images or screenshots you can do that too. See Edit any Photo or Screenshot for details.
Everything in the HelpXplain workspace is contained in slides. Even if you are just working on a single image, it has a slide as a container. When you save it to a normal image format (PNG, BMP, JPG or TIFF) you are actually saving a single slide with all its contents.
It is the slide that defines the borders of the image, not the image. The Size menu in the Home tab has tools for making an image fit a slide and for making the slide fit its contents.