# Display
## 
Display
The SubDDisplayToggle command switches the appearance of all [SubD objects](https://docs.mcneel.com/rhino/8/help/en-us/seealso/sak_subd.htm) between smooth and flat modes.
### **Steps**
* Press Tab.
* The Tab key does not toggle SubD display while you are picking a direction in commands because, at this point, the Tab key is used for locking a direction. To toggle SubD display while picking a direction, click on the [SubD Tools](https://docs.mcneel.com/rhino/8/help/en-us/toolbarmap/subd_tools_toolbar.htm) toolbar, or map the SubDDisplayToggle command to a key (e.g., F4) in Tools > Options > Keyboard and use it.
The SubDDisplayToggle command:
* Is nestable (can be run while other commands are running).
* Does not change object selection states.
For more information, please refer to the [Rhino documentation](https://docs.mcneel.com/rhino/8/help/en-us/commands/subddisplaytoggle.htm?Highlight=SubDDisplay).
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