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[Tracy Mitzner]

hi,
i'd like to present a stimulus for a minimum of 30 seconds with no limit on
the maximum presentation time (i.e., infinite), with a key press
terminating the slide anytime after 30 seconds.  i thought the following
property input/duration settings should work, but the slide terminates
after 30 seconds instead of giving the opportunity to view longer.

duration = 30000
allowable = {ENTER}
time limit = infinite
timing mode  = event

any suggestions would be much appreciated.
thanks,
tracy