You can use the options in the View menu to apply a gamma or 1D LUT to the monitor. You can apply 3D LUTs to the image window (in modules that support multiple viewports), the reference area, and the reference overlay .
(a) Monitor LUT List box
(a) Current Viewport 3D LUT List box
(a) Reference Buffer 3D LUT List box
The options in the Monitor LUT List and 3D LUT List boxes are defined in the Preferences menu. See LUT Preferences and Applying 3D LUTs to the Image Window.