fwiw: I just cranked up Internet Exploder ( ok, yes. I am quite biased about browsers ) and was unable to perform the necessary actions. Works just fine with Firefox, however.
But, yes, using the "img" ling provided works... I sim[ply prefer "doing it myself", as features tend to morph over time, and knowing how to do it manually generally is helpful over long time frames. ( I miss the stick shift in my car! )
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As for limits on photos, well essentially there aren't any that I know of. BUT!!! This forum is used by folks with high bandwidth connections and wall-sized monitors, as well as those with very expensive ( s l o w ) wireless connections with small screens. Etiquette dictates that you resize photos to 640x480 pixels ( though 800x600 is ok ) to help prevent users from having to scroll right/left as well as up/down. Also, larger pictures take a lot of time to load over a slow connection ( we have several active users with very limited bandwidth ), so it is a courtesy to keep images to a minimum, and to keep those images to a "reasonable" size.
btw: the number and size of the images has little/no effect on this forum provider, but is has a potentially large effect on users. The forum only stores the "link", not the image, which is stored on some other system, somewhere. ( ie photobucket ) Loading all of those images uses up -their- bandwidth... ( and that of the user )