It is used for opening one of the recently opened GDB. Names of these GDBs are remembered by the system and are displayed as GDB menu items. Choosing any of these items is equivalent to the command of opening the corresponding GDB.
Depending on ObjectLand settings the history list displays only GDB names or a full path to GDB file. If the string specifying the full path is too long, the history list will contain the beginning and the end of this string.
Menu item GDB+<name of GDB from history list>.
Selecting GDB from history list
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