Depending on your needs, you might give up some display speed to work at higher levels of rendering quality, or you might choose to maximize display speed by using Wireframe or Bounding Box display. Which method you choose depends on your preferences and the requirements of your work.
To see and modify an object's display properties, right-click the object, select Properties, and go to the Display Properties group box; see . These options affect display performance much the same way as viewport rendering options. For example, turning on Vertex Ticks for an object with a lot of vertices will slow performance.
One way to increase display speed is not to display something. You can use the Hide and Freeze functions on the Display panel, quad menu, , and to change the display state of objects in your scene. The Hide and Freeze features also affect final Rendering and Video Post output. See and .
The active levels determine which rendering levels 3ds Max falls back to when it cannot maintain the desired display speed. You can choose as many levels as you want but you are advised to choose only one or two levels for each type of degradation.