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$ControlActiveSetting

$ControlActiveSetting
is a symbol whose value is True if it is evaluated while a control is active, or in certain other previewing situations.
Detect when controls in Manipulate are being used:
Most plot functions use $PerformanceGoal to control visualization quality:
Hence the default behavior is effectively the following:
Detect when controls in Manipulate are being used:
 
Most plot functions use $PerformanceGoal to control visualization quality:
In[1]:=
Click for copyable input
Out[1]=
Hence the default behavior is effectively the following:
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