Because of the number of users on GridGammon, you usually cannot see the complete list of players. Filters allow you to indicate which types of players you are most interested in, and the GridGammon server will display those players for you.
The server imposes a hard limit on the number of players you can see at once; this limit is currently 200 for members (125 for guests), but may change in the future.
You can select which group of players you wish to see in your Lobby window by selecting one of the preset filters under the View menu, or you can create a customized view by choosing the Custom... option. The Filter popup menu in the Lobby toolbar provides an alternate way to select these options.
When you create a custom view, you can specify filtering options from two groups, called the A List and the B List. The A List consists of players specifically of interest to you, and may include players in your Friends list, opponents with whom you have an unfinished match, robot players, support staff, and tournament staff. Players who are in one of these categories have priority in you Lobby view.
Players in your selected the B List categories fill out the remaining slots in your Lobby view. You can indicate whether you want to see players who are Ready, Playing, Watching, or Away. If you have a cash account, you may also want to include other money players in your B List.
Because there may be more players that belong to the categories you have selected in your B List, you can indicate by rating which players you are most interested in. You can choose to view B List players closest to your rating, or closest to a rating number you specify.