Expand details in NSPrintPanel by default?

Can you post the part where you define the accessoryView with your options ?

I suppose it is an OSX app ?

Here is how I do it, and I always get options visible by default

This is in the IBAction of the button that launches the printing.

        let printOp = NSPrintOperation(view: printView, printInfo: printInfo)
        printOp.canSpawnSeparateThread = true
        let accessoryController = PrintPanelExtensionController()
       
        accessoryController.title = "Specific to app" 
        accessoryController.typeToPrint = self.typeToPrint 
        printOp.printPanel.addAccessoryController(accessoryController)
     // If you need page setup options :
        let options : NSPrintPanel.Options = [NSPrintPanel.Options.showsOrientation, NSPrintPanel.Options.showsPreview, NSPrintPanel.Options.showsCopies, NSPrintPanel.Options.showsPageRange] 
        printOp.printPanel.options = options
        printOp.run()

There is also a PrintPanelExtensionController associated to a PrintPanelExtension.xib

Been a while - thanks for the pointer to NSPrintPanelOptions but it doesn't help expanding the details.
Note that you'd have to reset to the initial app state (e.g. by deleting the app's container) or macOS will remember if you've previously expanded the details section.

My aim is to expand the details section by default starting with the first launch of my Mac app to help (inexperienced) users along finding the app specific print settings (accessory controller).

Any hints appreciated,
Jay

Anyone ever figure this one out?