Solid renders the scene in solid mode, which is the default mode:

Wireframe renders the scene in wireframe mode:

Displays a Target Aspect Ratio frame to show what is visible in game mode:

This option displays the names of the functions that are currently being called by the game engine.

• Count: The number of times the function is called
• Time: Shows the current frametime taken up by an instance

The more time a process takes up, the more expensive it is. Obviously, when debugging, it's a good idea to address these processes first. However, it is also a good idea to take note of processes with a relatively low time, but a high count number, as this can also cause issues.

• Latest Peaks: Shows any recent in frametime over a certain value for any functions shown; the purple number to the left displays the number of recent pagefaults caused by the engine
• Pagefaults: happen when the game engine runs out of memory and the operating system accesses the hard drive.

Displays current memory info. Useful for finding memory leaks.

Render Resources displays various statistics about DirectX use.

Draw Calls per Object shows the number of draw calls needed to draw an object.

Render Budgets shows information about CPU/GPU time and memory spent per frame

Enable / Disable the dual rendering mode in Sandbox

Pick from the list the type of 3d output you would like to render. e.g.: Side by side, anaglyphic, VR headset etc.

Distance between eyes used for stereo (interocular distance)

Distance to plane where stereo parallax converges to zero

If the information for each eye comes in the wrong order, you can flip the two around