Adjust the placement of the toolbar in our viewer

To adjust the placement of the main toolbar, set the IViewerConfiguration.ToolbarPlacement property to either ToolbarPlacement.TOP or ToolbarPlacement.BOTTOM:

var config = PSPDFKitController.CreateViewerConfiguration();
if (DeviceInfo.Current.Idiom == DeviceIdiom.Phone)
{
  config.ToolbarPlacement = ToolbarPlacement.Bottom;
}
await PSPDFKitController.LoadDocumentFromAssetsAsync(DemoFile, config);