Library function C - Change Disk

This command will acquire a Library disk for downloading.  A Library disk
must be selected using "C)hange" before it is available for use.  Once
selected, you may compress the entire disk and download all the files as a
single archive file, or you may download individual files on the selected
disk.

When you select a disk for downloading, RBBS-PC will display
the currently selected disk before changing to a new one.  If you do not
wish to change, press the [ENTER] key.

