Built-in commands
Small commands built into the standard Modify tab on the ribbon. Commands are added to the panel depending on which elements are selected.

By default, the commands that change the selection replace the current selection. If you hold the Ctrl key when running such a command, the resulting elements will be added to the current selection instead of replacing it.
Built-in commands are managed in the ModPlus settings window.

Use the Built-in commands option to add built-in ModPlus commands to the Revit ribbon, specifying whether to place the buttons at the start or end of the panel. You can also individually enable or disable desired commands from the general list.