--- loncom/html/adm/help/tex/Slot_CommaDelimited.tex	2021/03/09 21:51:22	1.4.2.4
+++ loncom/html/adm/help/tex/Slot_CommaDelimited.tex	2022/03/27 20:57:06	1.4.2.4.2.1
@@ -37,7 +37,7 @@ End Time must be later than Start time.
 Format requirements for the optional fields are as follows:
 \begin{itemize}
 \item ``Message when reservation changed'' can be: only\_student, student\_and\_user\_notes\_screen or none.
-\item ``IP or DNS restriction'' is a comma-separated list of allowed IP addresses or hostnames.  Individual IP/DNS items can have one of the following formats:
+\item ``IP or DNS restriction'' is a comma-separated list.  If a particular IP restriction is: deny access from, prepend ! to the item.  Individual IP/DNS items can have one of the following formats:
 \begin{enumerate}
 \item a range, e.g, 35.8.3.[34-56]
 \item partial IP with wildcard, e.g., 35.8.*