You can access Reference Activities through this button:

To create a Reference Activity, you need to fill in the following data:

| Field | Description | 
| Reference Activity | Name of the activity | 
| Shortcode | Enter a shortcode for the reference activity. It will display on the assigned activity. | 
| Shortcode 2 | Enter a second shortcode. It is optional. | 
| Use Crew Base | If checked, the activity picks up the base of the crew member regardless of where they are at the time of assigning the activity. | 
| Adjust After Time Changes by Default | If checked, the activity time/duration is adjusted by default after possible time changes. | 
| Comments | Enter text in the free text box. | 
| Data Type | Use Human resource for Crew related activities (e.g. training, simulator) and Vehicle for Flight related activities (e.g. AOG, maintenance). | 
| Filter | Apply filter if it is only active for a specific group. | 
| Hidden | The activity is hidden on the roster. | 
| No Conflict | If checked, it will not trigger a warning in case of conflict. | 
| Wholeday | The activity is for the full day, and its default length is 1440. | 
| Time Mode | This is the type of reference activity. | 
| Reference group | Enter the Reference group. | 
| Time Range | Set default start and end time, and default length of duty. | 
| User group | Apply if the activity only applies to some users. | 
| Color | Select a default color to display in the Gantt. | 
| Drawing Type | Upper or Lower half or full (for visual presentation in the Gantt). | 
| Airline Prefix | The activity is only active for the airline code selected, if needed. | 
| Mandatory Transaction Code | A transaction code is required when this activity is used. | 
| Active | If the receiver group is used, select the checkbox. | 
