When in the RE•VU Viewer, there are a few adjustments that can be made to change the layout or adjust the stream quality. All these options are located on the toolbar on the top right of the Viewer page:

Some information on the various options, from left to right:

• START AUDIO: This is the first thing that you want to select to start audio. 
• MUTE: Mute button for audio.
• AUDIO OPTIONS: Audio Controls for different streams, you can control master volume or click into the sliders for different stream level adjustments.
• VIDEO OPTIONS: Camera Icon. This controls video quality options, as well as your latency.
• LAYOUT: This allows you to switch between grid or switcher view.
• REFRESH: Refreshes all the streams.
• FULLSCREEN: Goes full screen with selected layout.

The most important options to the viewing experience are START AUDIO  and VIDEO OPTIONS set to Passthrough and a BUFFER between 500 - 1000ms.