Without specifying a value for the config argument, by default, config is set to linear:
ros2 launch interactive_marker_twist_server interactive_markers_launch.py
Or
ros2 launch interactive_marker_twist_server interactive_markers.launch.xml
The config argument can be changed (i.e. to linear, planar, or aerial:
ros2 launch interactive_marker_twist_server interactive_markers_launch.py config:=planar
Or
ros2 launch interactive_marker_twist_server interactive_markers.launch.xml config:=planar