Method procedure SLScope.TSLDataDisplay.ZoomBy(Real)
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procedure ZoomBy( AValue : Real );
void __fastcall ZoomBy( double AValue );
Visual C++ (MFC):
void ZoomBy( double AValue );
Zooms by Value, and saves the previous zoom into the zoom undo list.
If Value is 0<1 zooms out.
If Value is > 1 zooms in.