HDR Effect > Brightness Threshold & Bloom Scale...
It's not a prop, just sliders, so I can't right click to delete animation, and then there is no reference of it on the timeline that I can see (?)

It's so annoying!!!!
I inevitably change something without having backed to frame "0" and then I have to undo all this stuff once I realize that I muffed up the Bloom effect! 
Is there a way to reset animation on ONLY the bloom effect sliders?

Thanks and Regards!

You can find HDR in the timeline under project as shown here: http://manual.reallusion.com/iClone_7/ENU/Pro/Default.htm#iClone_7/Pro_7.0/09_Animation_Timeline_Editing/Project_Level_Tracks.htm

Just click on the arrow under project and it should be visible.

Hello!  Thank you 100 iClone-Coins for that!
I do see the 'arrows' that coincide with the changes per frame, within the Project Dropdown.  I very much appreciate that help, if I can answer any questions for you, please let me know!
-Tony D.