The Performance Control toolbar contains five preset options that define specific visual and performance settings for Smart Review.
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Optimal Quality – Settings for the best visual effects, but slowest performance.
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High Quality – Settings for very good visual effects settings. The performance may be slow.
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Balanced (Default) – Settings for the best balance of visual quality and performance
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High Performance – Settings for fast performance with acceptable visual quality.
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Optimal Performance – Settings for the fastest possible performance with the lowest visual quality.
Details
Click the Hide/Show Details button 
to toggle the list of visual and performance settings affected by the selected option.
When shown, the detail section is a read-only display that shows the state of a setting
for the option. Most of these settings are on and off, but some have values or specific
modes.
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A dashed line "-" in the State column indicates that the setting for the selected option is not applicable.
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An asterisk "*" in the State column along with red text indicates that the setting for the preset option does not match what is set in the current project. When you release the mouse from the slider or use keyboard control keys, the setting state or value is changed in the project to match what is defined for the selected performance option.
You can see the different values for settings as you move the slider to each option. In the figure below, you see the settings change for certain values when you move from the Balanced option to the High Quality option.
For example, the Balanced option turns on the Measurements display setting. However, if you turn Measurements off as you are working in the project (View > Settings > View > Display > Activate > Measurements) and then open the Performance Control toolbar, this setting displays with an asterisk and red text to show that it does not match the setting required by the Balanced option.
When you release the mouse from the slider, the software turns on the Measurements setting for the Balanced option.