Thanks you for your help, but it's still not what I'm looking for.
This is an extract from one of the linked tutorials ...
What I'm trying to ask, is whether there is any way to style the 'default' preloaded, which still appears when loading a 'Loader Layout'. There are only two styles to choose from for the default loader style, and I would love to find out how to customise them.
I would just be happy, if I could change the blue bar colour and style the width and height, as well as the thickness of the border.