Check file types during drags
To always check the type of files when dragging them onto dock items, check this box.
With this unchecked, you can drag any kind of document to any application. The application may not be able to open the document however.
Follow aliases when adding them to a dock
To always follow Finder aliases when adding them to a dock, check this box.
With this unchecked, dragging an alias into a dock will make an alias to that alias, rather than adding the original item.
Add URL documents as aliases to the original
To add Finder URL documents as aliases to the original, rather than making a DragThing URL item, check this box.
This could be useful if you have passwords in your URL documents, and don't want them stored in DragThing.
Delay before switching tabs
To change the delay between dragging an item onto a layer tab and the tab coming to the front, drag this slider.
Delay before maximising docks
To change the delay between dragging an item onto a minimised dock and the dock maximising, drag this slider.