In the OpenSeadragon module when the "Constrain image to viewport" config option is set the expected behavior is to not allow the image outside the viewer (i.e drag the image outside the viewer)!. Some notes suggestion this config should prevent the user from opening up in full screen mode. Either one does not seem to work.
Steps to reproduce:
- Set the Constrain image to viewport in the openseadragon admin form
- Go to large image where openseadragon is used
- Drag the image outside
- (Or click to open it in full screen mode)