To create a new custom panel layout
- Set up the layout, panel sizes, and panel contents you want. 
- In a panel, select Panels > Panel Editor. 
- Click the Layouts tab. 
- Click New Layout. 
- Type a descriptive name for the layout in the Name text box. Note: Panel layouts cannot use panels that have been torn off. If you select a panel layout that includes a torn-off panel, Maya displays a warning that it cannot use the panel. Any available panel is used instead. For example, the built-in  Persp/Outliner panel layout usually places the  Outliner in the left pane and the  Perspective view in the right pane. If you tear the  Outliner off into its own window, a warning is issued and another panel is put in place of the  Outliner.  Once you close the tear-off panel, it can be used by panel layouts that include it.  
 
To assign a custom layout to one of the icons in the Quick Layout bar below the Tool Box
- Create custom panel layout. 
- In the Quick Layout bar, right-click on the thumbnail you want to assign the new layout to, and select the layout from the menu. 
- To change the thumbnail image, right-click on the thumbnail again and select Change Image. You can select a pre-made image or load an icon image from a file. 
To delete a saved layout
- In a panel, select . 
- Click the Layouts tab. 
- Click the layout name, then click Delete.