Apple Mail in Big Sur, where are the arrows which show messages I've replied to and/or forwarded?

Hmmm, now the arrows have appeared! But they remain what I'll term "non-functional." First a screenshot...

That's the left edge of my messages panel (cut off last names for privacy) and you can see the arrows signifying that I replied to the message.

BUT the arrows are not "clickable". When clicked, they used to display my reply message. That was really useful. Now do I have to sift endlessly through my Sent mail folder?

thanks,

--JS

PS I'll go check out the color thing now.

Here is what the three circle controls for every window now look like.

It used to be a crisper set of red, yellow, and green buttons (I think). Now they seem to have quite similar tones. I'm partially colorblind. The three dots used to be quite distinct. Now they all look similar, not identical, but similar enough that I have to look real close to appreciate that they are different. I found some interesting color shifting options in System Preferences with names of colorblindness schemes, but they didn't fix it. For the 15 months I've owned this MBP 16" (late 2019), the three dots were crisp primary color red, yellow, green. Primary colors I can usually tell apart!

-- JS

So I went into System Prefs > Displays > Color

You were right, I was not using the topmost profile. So I chose the topmost profile called default. But it did not change anything on the display. At least yet. Do I need a restart?

Thanks for all the help and patience.

--JS

That application was Firefox browser. But it affects all applications. Here are Apple Mail and Apple Messages.

Yes, using Column View.

--JS

Ah ha! I had found this screen and tried toggling the contrast option, but I must have been on that other color scheme before you returned me to the default scheme. This worked!

Thanks!

--JS