# Rundown: Timing

> Durations, countdowns and auto-advance.

Glider documentation · Playout & On Air · Web page: https://cgglider.com/docs/rundown/timing/

Sections of this page: [Playlists](https://cgglider.com/docs/rundown.md) · [Row settings](https://cgglider.com/docs/rundown/rows.md) · [PGM & PVW](https://cgglider.com/docs/rundown/pgm-pvw.md) · [Keyboard](https://cgglider.com/docs/rundown/keys.md) · [Timing](https://cgglider.com/docs/rundown/timing.md)

- A row with a duration gets an advance time when taken; the countdown bar runs against it, updating every 50 ms.
- At zero, auto-Next fires — unless Manual mode is on.
- A duration of 0 means hold: the row stays until someone takes the next one.
- Take-out sets a hide time rather than hiding immediately, so the out animation can finish.
- Both the Output tab and the live page re-render when a hold or an auto-advance expires.

> **Take state merges, it does not overwrite:** When editor and server states meet, on-air flags are merged rather than replaced — so an edit elsewhere in the page does not accidentally take a graphic off.