1) N must be a positive number.
2) The + can be omitted.
3) As many of the N messages that exist.
4) Can also use - (or +) with first, prev, next, and last.
-messages beginning with (or ending with) message
+must be a positive number, messages beginning with (or ending with)
+message
.IR num .
.I Num
may be any of the pre-defined symbols
.IR num .
.I Num
may be any of the pre-defined symbols
.RI next: N
.TP
.RI last: N
.RI next: N
.TP
.RI last: N
-The first, previous, next or last
-messages, if they exist.
+As many of the first, previous, next, or last N messages that exist.
+As above, N can be preceded with - to end the listing at the specified
+message, or with an optional +.
.PD
.PP
Commands that take a folder name
.PD
.PP
Commands that take a folder name