> ## Documentation Index
> Fetch the complete documentation index at: https://docs.time2.bike/llms.txt
> Use this file to discover all available pages before exploring further.
# Standard vs dual slalom modes
> Pick the right mode for your race format.
Two session modes:
## Standard
One screen, one operator. Endurance, criterium, gravel, XC, short track, time trial — anywhere riders cross the line one at a time and you record by bib.
* Big **START / PAUSE / STOP** at the top.
* Numeric plate input always focused; **Enter** records a `finish` for that participant at `Date.now()`.
* **On course** list sorted by elapsed time, with a `✓ finished` pill once recorded.
* **Registered riders** list — tap a name to record a finish at "now" (for unreadable bibs).
* Long-press / right-click any row → manual time, DNF, DNS, DSQ, delete.
## Dual slalom
Per-device **role**, picked when joining the session. Built for two-lane head-to-head racing where one device sits at the top of the course and one (or two) at the bottom.
* **Starter** — top of course. "On deck" panel: type both plates → press **START**. Emits `lane_start` with red + blue lane assignments and a start timestamp.
* **Finisher** — bottom of one lane. The whole screen is a single FINISH button labeled with lane color and live elapsed time. Press = `lane_finish` for that lane.
* **Self-correct** — finisher can press **CLEAR** to undo the last recorded time if they pressed too early.
Up to 4 simultaneous devices is "just more subscribers" — the architecture doesn't change.
All times stored to 3 decimal places (ms). Display rounds to the session's precision (often 10 ms for slalom).
## Choosing
| If your race is… | Use |
| ---------------------------------------- | ----------------------------------- |
| Mass-start with one finish line | **standard** |
| Time trial / individual start | **standard** |
| Downhill (one rider on course at a time) | **standard** |
| Enduro (timed stages) | **standard**, one session per stage |
| Dual slalom or 4X | **dualSlalom** |
| RFID with auto-finish detection | **standard** + RFID watcher |