This command will raise the full layer dialog which will allow various layer properties to be set for groups of layers, or individually. There are a series of buttons along the bottom for "freeze all", "thaw all", "off all", and "on all". There is also a button which can be selected to create a new layer
This menu pick will open up a dialog to allow you to select a command alias. An alias is somewhat similar to a keyboard shortcut. To be useful an alias should be between one to three characters in length. This is not a program limit but rather a practical limit. Viewer will allow the alias to be as long as you wish, but if an alias gets too long it becomes more bother to use than the command it is replacing.
The command aliases are kept in a file called HOME/lx-viewer/lxv.pgp. The alias file is read at start up and after any changes are made using the dialog. It is also possible to modify the file with a standard text editor as it is a plain text file and the format is simple to follow.
After making changes using the dialog use the "OK" button to close the dialog and write the changes to the pgp file. Using "Cancel" will discard any changes.
Some examples:
ZE as an alias for ZOOM EXTENTS
Z as an alias for ZOOM
EXIT as an alias for QUIT (this one violates the 1-3 character rule mentioned above)
These are only examples. You are free to use any combination of characters for an alias.