I would really like to be able to set an extra property on a data-bound picture, like reduce to (Height and WIdth in pixels) where H is calculated from W or vice-versa using original Aspect Ratio.
On the server the pic would then be resized to this size.
The reason for this all is that even when you display a thumbnail on a site, when you give people the possibility to change the picture, they do not hesitate to upload a 10 Mb pic.
Loading this page will then be slower then necessary, especially when the page holds many pics.
So the property should be set in design mode, not (upload) user mode.