Animated OverLay (use the browser's Refresh button to review the actions)
After loading two related images (in this case, bright light and ultraviolet images of the first surviving folio of Otho A. vi), the user chooses two pairs of corresponding points on each image by activating
, the double-cross button. Pressing 
will then OverLay the two images.
[OverLay Otho A. vi, fol. 1r, bright light and ultraviolet]
Using the
slidebar above, the user can move from one representation to another. By selecting the 
button, the user can enlarge the combined images. The other buttons provide additional functions.