Registered ICC players can have a personal library of up to 400 games. Libraries are different than your history games. Your "history" contains the last 20 games you played, so the games will disappear as you play more. Library games won't go away until you delete them.
Menu above: View > My Profile > A window opens > Click on the Games Tab. Here you find under 'Most recent games (history)' your 'Game Library'.
Right-click on a game in your library and choose one of the options from the pop-up list. (Examine Game, Delete Game, Mail Game Moves, etc.)
To save a game you just played or examined, click on the 'Save Game to Library Icon' in the toolbar above the board. It is a yellow folder with a red arrow pointing to the left. To save a game from your or someone else his history type: history or history username eg. history lisebeth > right-click on the game and choose 'Save to Library Slot' from the popup menu. (You can do the same with a library eg. liblist Lisebeth)
Command line method:
Type on the command line under the Main Tab of your Channels Console: liblist
More commands and information in "help libraries"