The about-image allows you to insert an image into an about box. The about box shows each image one at a time, changing the image as the user clicks in the about box. Essentially, each image is a page of the about box.
The about-text tag allows you to define a piece of text which gets displayed in the about box. This text only gets displayed on the first page of your about box (see about-image).
Same as <about-text> except there is no data element. Instead, it always holds the version number value from the