Commands in up to 3 user command tables are in effect for all applications. These commands can override identically named commands in the site or system command tables, and are themselves overridden by identically named commands in the application command table.

You must specify the application ID of the user command tables in the ISPF configuration table, or the user command tables cannot be used. If you do not have a user command table that matches the application ID, the ID is ignored until the table is present and ISPF is reinitialized.