exposure warning on the fly

[pedalracer]

Hello

is there the basic function in XV MP to highlight exposure (over/under)?

I am in the process to shoot product images on white background with flashlights. Well, outcome is so so but I do my best.
Helpfull would be if XV wich I use to fast review the images highlight over exposed zones. Best 'd be if I could set the limit, e.g. 244-255.
I'd like to trigger it via hotkey or best be if I could set it to persistent in startup setting.
If not integrated, perhaps via addon?

Thank you

PS:
I shoot with 3 flashlights (Yongnou), and try to force white the background (white paper like table top).

[xnview]

currently no