6.5 auto shadow hylite ruins the scan

[Harry Putnam]

I was pretty amazed to find that clicking on the auto hylite shadow midtone completely
ruins a prescan. Turns it into a grey contrastless mess.

And still since all the way back I still cannot remove the carnage with a simple Ctrl-z.
I have to open histogram and hit reset.

I suspect I have something in `options' set way off base causing the auto
tool not to work as expected. Is there some way to get a text printout of
all my settings other than laboriously copy/paste?

Maybe someone would recognize a bad setting that is the culprit.

Is there some other way, avoiding the auto tool, to get a reasonable result with one
or two clicks for those times when it isn't necessary to get the best possible hand
crafted time consuming result?

[RAG]

Hello again Harry,

On my PC I am able to reset by holding down the Alt Key and clicking on the auto button.

You will also notice that when you hold down the Alt key the options button changes to a master reset button.