Histogram Transformation Middle Slider Missing

[Bill001]

Hi,

Sorry I can’t reproduce this problem but I had problems stretching a finished stack of Milky Way images.  The HT was looking wierd and it took me awhile but I noticed I could not find the middle slider anywhere.  Had left and right sliders, but no middle slider.

I opened other finished project and still no slider.

I closed PI rebooted the Mac, restarted PI opened old projects. HT slider was fine. Open current project and the middle slidder was immediately available.

Sorry I am not able to reproduce this quirk but at least I’m out of the woods of now.
Thanks,
Bill

[Bill001]

I should add my PI installation is on a Mac, and my Mac was acting odd too. For example: getting no respnse when clicking on a file on the desktop (mouse right click) to get pop-up menu to select sending a file to trash, or other simple file/mouse activities (slow).  Or selecting a group of files to delete but getting no pop-up offering any file handling options