It is hard to understand why there is no method within template toaster to add a hyperlink to an image. This is available for foreground images in the header so why the lack of this for other images? Surely this is a basic requirement.
Considering you are currently on V6 + it is surprising that this has not been implemented. The suggestion that this can be done after export is not helpful, as this involves extra editing outside the templatetoaster environment.
Please, add this facility before the next major upgrade.