Checks for changes made to spec files that are in use in this drawing.

General Properties
Checks for changes to a spec in a 3D model and sets spec update notification options.
- Check Now
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Checks for changes to the current spec.
- Spec file check: On Startup
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Enables or disables spec updates at startup.
- Spec file check: Automatic
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Enables or disables periodic spec updates.
- Hours between checks
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Sets interval between automatic spec updates.