Place the Broker before you open OBS.

A free, in-browser layout preview for streamers: pick your scene size, drag the Browser source (800 × 600 as the app asks, or 1280 × 720) where you want it, choose the Centered, Bottom left or Bottom right preset, and copy the position and size to type into OBS. No account, no upload, nothing leaves your browser.

BROWSER SOURCE · 800 × 600

Simulation of placement only: the Broker and his caption are drawn by this page from the approved artwork; in the real overlay the app renders them and the line is generated by AI. Nothing here is saved or sent anywhere.

Use the numbers in OBS

Add the source first. In the app: OVERLAY → Set up OBS → Enable OBS overlay → choose the same preset → Copy OBS Source. In OBS: + → Browser, name it Signal Broker, keep Local file off, paste the address, set Width and Height to the Browser source size you selected above (800 × 600; the app’s card asks for 800 × 600, the developer’s own scene runs 1280 × 720), click OK. The full guide.
Then place it. Right-click the source → Transform → Edit Transform. Position = the X and Y above; Size = the on-canvas size in the summary (the selected source size at the chosen scale, 800 × 600). Or simply drag it in the OBS preview to the same spot.
Keep it above your game source with its eye icon on, and keep Signal Broker open.

What the presets mean

Centered. The Broker is centred in the source with his line above him.
Bottom left / Bottom right. The Broker sits in that bottom corner of the source with his line opening toward the middle of the source, so a corner-placed source reads naturally over the game.
Dialogue size sets how large his captions are. Preview the preset from the app before copying (Preview preset).

The overlay shows his avatar and spoken captions on a transparent background; his voice is not in the source and reaches OBS through Desktop Audio.

Limits

A layout simulation: the Broker’s art and the caption bubble are drawn by this page from the approved avatar pack, not rendered by the app; the sample line is written, not AI output.
The numbers are a starting point for the Transform dialog in OBS; the real overlay address comes from the app (Copy OBS Source) and works only while Signal Broker is open with the overlay enabled.
Nothing is saved or uploaded; reloading the page resets the preview.

Then put him in the scene.

SET IT UP IN OBS DOWNLOAD FOUNDER ALPHA

Founder Alpha is available to customers in the United States. Founder Alpha is early-access software. Signal Broker is an AI system. The Broker's words and voice are generated using AI. No person is speaking or writing what he says.