global-semantic-decoration-mode

global-semantic-decoration-mode's value is

nil

Documentation:
Non-nil if Global-Semantic-Decoration mode is enabled.
See the command `global-semantic-decoration-mode' for a description of this minor mode.
Setting this variable directly does not take effect;
either customize it (see the info node `Easy Customization')
or call the function `global-semantic-decoration-mode'.

You can customize this variable.