# Routing Beams

HOLOPLOT Plan uses routing matrices to define how signals flow through a system at different stages of the design process. These matrices allow you to control signal distribution, processing requirements, and relationships between beams.

There are three routing matrices in Plan:

* **Input → Beam Routing Matrix** – used to route inputs to beams and define which signals will feed which beams.
* **Delay Downmix Matrix** – used to route signals from main beams to fill and LF beams, with gain and delay applied at each crosspoint.
* **Processor Matrix** – used to define processor channel requirements when working with third-party speakers. This matrix ensures the correct processor channels are assigned before exporting to Control.

If routing is missing from any of the matrices, the preset will be marked **orange** in the top status bar and will not be ready for export, see [#exporting-presets](https://docs.holoplot.com/saving-and-exporting#exporting-presets "mention")