Rounded vs. Blunt edges on highlight tool
Hello. Would anyone here know, by any chance, how to select the type of edges (round or blunt) on the highlight tool in Adobe Acrobat Pro (it's what I'm using, v4, 64bit)?
I've been looking all over the Internet for an answer to this, including tons of messages in the Adobe Community forum, but couldn't find anything satisfactory. In fact, many people say it's not possible to switch. But I disagree, and here is why:
My highlighting tool had always given me blunt edges until I upgraded to the new Acrobat version (Modern Viewer), which I've been using for over a year now. In the new version, the H.L. edges became rounded, so I thought it was something related to the upgrade. I spent over a year thinking that. Cut to last week (2024-03-15) when my 5-yeard old son hit my keyboard by mistake and BAM -- the highlight tool started giving me blunt edges, right then and there. My son made the switch by mistake, and I now have highlighted excerpts showing both edges in the same document!
Please have a look at the printscreen below:

I have text highlighted in yellow and purple with round edges (from before my son hit my keyboard), and green with blunt edges (which I got the minute after my son hit my keyboard). In the flick of a switch (or rather, with the hitting of a keyboard key!), the HL style changed, and I don't know how to put it back the way it was.
Well, to be honest, I prefer the blunt edges, but it would be nice to know how to select that particular property at will. I've been through hundreds, perhaps thousands, of messages so far, but can't find an answer to this. In fact, I've seen some people go so far as to categorically state you can't change styles, that's it's something baked into Adobe's factory settings. But clearly, that is not he case, since I literally saw the change before my eyes: I had a file open and was highlighting it, round edges as usual. In comes my infant son, who hits my keyboard and has it changed involuntarily, and the next minute I'm highlighting text with blunt edges. . One minute I had round edges, the next minute I had blunt edges. I can't figure out how this works!
Can anyone help? Does anyone know how to select the type of edges you want for the highlight tool?
Thanks so much in advance.