Well thank you for the well done but I've done nothing! Just (almost) only done what you instructed!

A mere instrument of your instruction!!

OK another question ... in File Manager I have changed the view to Detailed View, but I can't figure out how to change the widths of the columns? I've tried holding down the left button on the glide pad (no mouse at this second) and moving it but that failed surprisingly.
I've also tried similar things to the edges of dialogue boxes which also failed ? (the little white arrow fails to move it!)
Also trying to see in the File Manager, how much space is left on the hard drive and can't seem to get to the root enough to see the properties of it, please ?