The Render flyout provides a few different rendering options.
The Render flyout lets you choose among these buttons:
The Render buttons let you render the scene using the settings without using the Render Setup dialog. Choosing one of these buttons also changes which rendering settings are active on the Render Setup dialog.
Invoking the Render command from the Rendering menu or by pressing Shift+Q uses the active mode on the Render flyout.
By default, all the rendering options use the default renderer Arnold. You can change the Production renderer by using the Renderer drop-down list on the Render Setup dialog.
Changing the render mode on this flyout changes the comparable settings on the Render Setup dialog Target and Renderer drop-down lists.