Precision

Controls the margin of error allowed while the Freeform tool is drawing a straight line before it switches to drawing a spline.

Supported on: At least Windows Vista
Precision:

Registry HiveHKEY_CURRENT_USER
Registry PathSoftware\Policies\Microsoft\Office\12.0\Visio\Application
Value NameLineTolerance
Value TypeREG_DWORD
Default Value5
Min Value0
Max Value10

visio12.admx

Administrative Templates (Computers)

Administrative Templates (Users)