The History panel tracks and allows switching to previous visualizations. It also allows you to save your favorite visualizations to easily come back to them. The panel is composed of two tabs: All and Favorites.
The default tab, All, is a list that shows your previous visualizations during a session. The icon on the left shows the plot type of the visualizations. The title on the right shows what changes have been applied in that visualization. Hovering over a history entry will display a tooltip indicating exactly which features were mapped to each dimension in that visualization.
Selecting any history entry will immediately switch to that visualization. Changes to Grid Options are now retained in the history entries. Selecting the Star icon on the right of any history entry will save that visualization in a separate list on the Favorites tab.
The Favorites tab shows all visualizations that were starred in the All tab. This list functions identically to the All tab, except that clicking the Star icon will now remove that entry from this list.
Adding visualizations to the Favorites list then saving a .vip project file is a good way to save visualizations for later review. You can also rename history entries by right-clicking and typing a more descriptive name for the visualization.
From either tab, you can play through your history entries using the controls at the bottom of the panel. This allows you to set a delay to show each plot for a specified duration, which can be useful for recording a video or GIF that shows multiple plots of interest. You can step through the plots one by one, play through all of them, or skip to the first or last in the list.