> For the complete documentation index, see [llms.txt](https://docs.hedge.video/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hedge.video/scopebox/palette-types/luma-and-rgb-timetrace.md).

# Luma and RGB TimeTrace

Traditional scopes only show you what's happening right now. The Luma and RGB TimeTrace palettes continuously refresh, showing you your luma (or RGB) history over the last 300 frames. You can use the TimeTrace to catch an excursion or to get a quick glance view of how your signal changes over time.

The signal draws in an endless loop along the X axis. The Y axis shows a histogram of your signal, each line being one frame of video, with black on the bottom and white at the top.

![](https://1060439511-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-LStRji2w1AYja1bLBFv%2Fuploads%2Ft0v4qjO33OD4ZCPvg2dp%2Ftimetrace.png?alt=media\&token=6b59a4bd-2f86-4c05-a200-e701b08bbadb)


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