# About system graphics and user tags

The following HMI tags can be used to make graphic objects appear as though they are blinking on and off.

Tag names | Types | Descriptions
--- | --- | ---
system\BlinkFast | Digital | Toggles on and off every 100 ms (10 times per second).
system\BlinkSlow | Digital | Toggles on and off every 500 ms (twice per second).

The following tag contains the name of the current user.

Tag name | Type | Description
--- | --- | ---
system\User | String | Contains name of the logged-in user.

## See also

About system tags

About system alarms and time tags

About HMI tag types