keyword "in" missing in the LC documentation ?

[paolo mazza]

Looking for the keyword "in" in the documentation of LiveCode 4.6 I found only:

keyword "in" =  Designates the string that contains a chunk
expression. ( i.e. the number of items in the hilitedLines of me)

What about the keyword  "in" setting the time for pending messages (
i.e. send beep  to me in 5 sec)?

I can not find it in the documentation.

All the best

Paolo Mazza