Max width of 640px is too restrictive

[gudata]

Probably it is good idea to leave this number to be responsible to the one which uses the dialog.

[cirkut]

I think the best thing to do would be to set the max width to the current document width minus a padding (which can/should be set either in the CSS or the options).

Personally, I think 940 is a good max-width, but having a responsive option would be awesome.

[jstebenne]

A year later, I agree with you guys. I edited the code on my side to make the limits bigger.