Depending on the revision number, features supported by GP-3300 series are limited. Please check the revision number on your display unit.
For more details, please refer to the following.
126.96.36.199 For Those Using GP-3000 Series
188.8.131.52 GP-3300 Series
184.108.40.206 GP-3300 Series - Models that support control
220.127.116.11 GP-3300 Series - Hand-held GP