File Heatmap

Adds on-demand heatmap (age) indicators to the file to show how recently lines were changed

Use the command to turn the annotations on or off

Press Esc to turn off the annotations

Indicator color reflects the age of the most recent change (hot or cold), while indicator brightness ranges from bright (newer) to dim (older) based on the relative age

For more options, open the Settings UI and search for gitlens.heatmap