isOverlayRegistered

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isOverlayRegistered() Function

Introduced in version 1.7.0
Returns 1 if the specified overlay is registered, or 0 if it is not registered.
This function will return 1 even if a registered overlay is hidden using the Window > Overlays menu. To unregister an overlay, use closeOverlay().

Usage

[h: reg =  isOverlayRegistered(name)]