I've noticed the lack of a scrollbar completely confuses me on sites that have a scrollable iframe and there's no content "cutoff" to illustrate there's more st

I've noticed the lack of a scrollbar completely confuses me on sites that have a scrollable iframe and there's no content "cutoff" to illustrate there's more stuff to see. I recall the startupweekend website had this issue but they seem to have redesigned around it.