Troubleshooting
No signs appear after pressing the button — check three things: that you have actually placed a sign, that any hand-built boxes are wired into input 2 and not input 1 (input 1 is the building geometry and passes through untouched), and that each hand-built box carries a front-face group.
Signs show colour but no glow — the colour in the viewport is a preview. The glow is only visible in a Karma render - press Send to Solaris and render.
Rendered signs are dark — check Keep Colour (Cd) and Keep Emission (emit) are both on. Check the material library has not been deleted. Press Send to Solaris again to rebuild it.
Tubes or signs are the wrong size — set Real-World Scale to match your scene's units: 1 for metres, 100 for centimetres, 3.28 for feet.
A note did nothing — press Give me the Signs, or Apply on a card, to apply a note - typing it alone does nothing until you do. Read the status bar for what was understood and what was not. A card's Note or a Manual Override can beat a street-wide note; the status bar says which one did. A scope phrase like "big signs" needs an instruction paired with it - "red on the big signs" works, "big signs" alone does not.
The scene is slow while placing signs — turn on Placeholder Boxes Only, or press B in the viewport, while you lay out a street. Lower Tube Detail for a heavier scene.
The Signs list is empty but signs exist in the scene — press Rebuild List from Signs to give every sign already in the scene a card.
Still stuck? Find me on the JVtools Discord — the invite link is in the Utilities folder on the HDA node.