Undo or redo in Visualizer
You can use the Undo and Redo buttons on the Visualizer menu bar or press Cntrl-Z/Cntrl-Shift-Z or Command-Z/Command-Shift-Z for most operations.
Undo/redo can apply to the last 20 actions. When you save or save-as a report, Visualizer resets the undo/redo history.
          Caution: 
         
         
          Undo/redo is not available when using the Explore in Visualizer feature.
         
         Undo/redo applies to most report-building activities including chart formatting.
          Note: In the Chart Formatting pane, use the keyboard commands.
         
         These operations cannot be undone/redone:
- Toggling Delay Charting mode
 - Uploading custom maps
 - Saved expressions
 - Saving and renaming files
 - Editing Column Selectors
 - Color palette creation
 - Advanced conditional formatting
 - Clicking a legend to hide columns
 - Creating and saving expressions in the Expression Editor
 - End User Data Blending