There are many ways to obtain an ISPF member list. You can do it from item 1. BROWSE/VIEW and 2. EDIT on the ISPF main menu. You can do it from 3.1 LIBRARY and 3.4 DSLIST using line command M (and of course by using E, V or B). The funny thing is that all of these lists varies in appearance. And for those of us who likes to code our own stuff the ISPF service MEMLIST can also produce a member list.
Common to all those member lists is the primary command S. However, the functionality of S depends on the function producing the member list. Common is that after S you can specify either a member name or a wildcard (* for 0 to many characters, % for a single character). If your member list is produced by EDIT, VIEW or BROWSE you just press Enter and you will enter the specified member or the first member matching your wildcard.
If the member list is produced by other functions than EDIT/VIEW/BROWSE (for instance M in 3.4 or 3.1), then you can specify a line command to be used on the member(s) matching the member name/wildcard. This way you can for instance delete all members starting with IBM by specifying S IBM* D in the command field and press Enter. If you choose to specify S IBM* E to edit then you will be entering EDIT for all members starting with IBM one at a time. This can be a little overwhelming if there are many members. Fortunately you can interrupt the walkthrough by using the command CANCEL in EDIT/VIEW/BROWSE.
S <wildcard> <line command> is a powerful command that can make your life much easier, but it should be used with caution. I mostly use it when I need to copy a selection of members from one PDS to another, for instance S XXX* C to copy all XXX members to another PDS. Especially the the use of D for delete must be closely observed.
If you start exploiting the possibilities in this tip you may discover that your member list is empty, even though you know there are members in your PDS. Press F7 (UP) and you will discover that the member list is not empty but was shown from the very bottom. This unfortunate behaviour can be fixed by choosing another terminal type in the ISPF options. Choose for instance the terminal type 3270L2. How on earth the terminal type is influencing the display of member lists is a riddle to me and it was pure coincidence that I stumbled over this solution/correspondance.