In main menu bar: Window
               > Settings/Preferences > Panel Editor
         In scene view: Panels
               > Panel Editor
       
      
      Tabs
         
         Panels
            Displays existing panels
               you can rename or delete.
            
            
               - Select a panel and edit the Label field
                  to rename it. You cannot rename the Top View, Side View, Front View,
                  or Persp View panels.
               
- Select a panel and click Delete to
                  remove it from the list.
               
New Panel
            Contains controls for
               creating a new panel type.
            
            
         Layouts
            Displays existing panel
               layouts.
            
            
               - Click New Layout to
                  add an item to the list.
               
- Click a layout and click the Edit
                     Layouts tab to edit it.
               
- To delete a layout, click it in the list,
                  then click Delete.
               
Edit Layouts
            Displays the current
               panel layout for editing.
            
            
               - 
                           Create a custom panel layout- Configurations 
- 
                        Use this tab to change
                              the configuration and proportions of the layout.
                            From the drop-down list,
                              select the panel layout you want.
                            Resize the panes by dragging
                              the borders in the thumbnail view of the layout. The main window
                              changes to reflect your changes.
                            
 Contents Use this tab to change
                        which panel contents appear in the layout.
                      - Scene Independent 
- 
                           Scene independent layouts
                                 are available for all scenes. Their contents are defined by panel types. 
                               If you have multiple
                                 panels of the same type in a scene, it is not certain which panels
                                 show up when you select your layout. This is not a problem in most
                                 cases; however, if you are working in a particular scene a great
                                 deal, then develop layouts that you can save specifically with that
                                 scene.
                               
- Associated with Scene
- 
                           These layouts are only
                                 usable with the current scene. You can specify a particular panel
                                 if you have more than one of the same type.
                               
 
History
            Displays the history
               of the panels you used.
            
            Maya keeps a record of
               panel layout changes. This lets you step forward or back through
               each view. This is helpful if you are moving between two layouts
               and cannot remember their names.
            
            - History Depth
- 
                  Specify the number of
                        configurations you want stored in the history.
                      
- Wrap History
- 
                  Toggle this on to return
                        you to the first view or the most recent view configuration when
                        you reach the end of recorded history.
                      
- Clear History
- 
                  Click this button to
                        delete the record of all the panels you have used.
                      
- Previous Layout
- 
                  Click this button to
                        browse back through the panel layouts.
                      
- Next Layout
- 
                  Click this button to
                        browse forward through the panel layouts.