> For the complete documentation index, see [llms.txt](https://docs.miltechsimulations.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.miltechsimulations.com/miltech-simulations-microsoft-c-17-globemaster-iii/the-aircraft/cockpit-displays/head-up-display.md).
# Head-Up Display
{% hint style="warning" %}
Please note that starting on Version Number V1.1.15, aggressive performance optimizations have been made, including limiting pages on PFD and MFDs, and mirroring both copilot's FMCs. More information here: [NOTAMs](/miltech-simulations-microsoft-c-17-globemaster-iii/product-details/notams.md)
{% endhint %}
Head-Up Display
1. **Airspeed Autopilot Mode:** Displays the selected Autopilot Airspeed mode (ATHR ACT, IAS, MACH, etc). The white box displays when Autothrottle is engaged. The active mode will display in the upper box.
2. **Roll Indicator:** Displays the current aircraft roll attitude, as well as the roll limitations for the current speed/altitude.
3. **Vertical Autopilot Mode:** Displays the selected Autopilot Vertical mode (ALT, VV, etc.). The white box displays when Autopilot is engaged. The active mode will display in the upper box.
4. **Airspeed Tape:** Displays the indicated Airspeed in Knots. Contrary to most commercial aircraft, the airspeed tape increases moving downwards.
5. **Altitude Tape:** Displays the current Baro Altitude. If BA/RA is engaged, the tape will display Radio Altitude.
6. **Altitude/Vertical Speed Indicator**
7. **Flight Path Vector indicator/Attitude Reference:** Displays the aircraft attitude and direction of travel.
8. **Lateral Autopilot Mode:** Displays the selected Autopilot Lateral mode (HDG, ROLL, LNAV, etc.). The white box displays when Autopilot is engaged. The active mode will display in the upper box.
9. **Heading Indicator/Selected Heading Bug:** Displays the current heading, as well as the selected heading as on the autopilot panel.
10. **HUD Brightness Mode Switch:** OFF/NIGHT/AUTO/DAY
11. **HUD Manual Brightness Selector**
12. **HUD Declutter Pushbutton:** Cycles through the declutter states, removing redundant information for ease of visibility during sorties.
---
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