Your first mission in four steps.

On the Build page, the first dropdown is labelled Mission cell. A cell is a combination of three things:

• Map — Caucasus, Syria, Persian Gulf, Marianas, or Normandy.
• Era — Modern, Cold War, or WWII.
• Scenario — what you actually do, e.g. SEAD (suppress enemy air defenses), Carrier Ops, Strike, Foothold, Training Range.

A safe first pick: Caucasus / Modern / DemoComposition. It is a simple bowl-shaped airspace with friendly fighters and some ground threats — easy to fly, easy to spot what changed when you tweak settings.

A recipe is a one-click preset that fills in the threat/support sliders for you. Pick from the Recipe preset dropdown:

• sead_normal — moderate SAM threat with friendly support.
• cap_light — a couple of red CAP flights to chase.
• strike_normal — ground targets to bomb plus medium air-defense.
• multirole_hard — everything turned up.
• training_basic — almost no threats, just fly.

Don't want a recipe? Skip this — the sliders below give you a sensible default. You can also pick a recipe and then tune the sliders further.

Scroll down and click the orange Build mission button. The engine takes ~8 seconds to:

1. Open the seed mission for your cell.
2. Pull the right number of fragments (units, flights, ground groups) from the 54,000-piece library.
3. Inject them into the seed at the correct anchor points.
4. Renumber unit IDs, remap flags, repackage the .miz.

A live status panel shows progress. When it says Completed, you are ready for step 4.

Click Download .miz. Drop the file into your DCS Missionsfolder (or open it directly with DCS → Mission → Open). Slot up, take off, fly the mission.

When you're back, head to History to grab the same .miz again, or hit Remix to build a small variation (different threat count, different aircraft, etc.) without retyping every setting.