How to get into full commenting mode?

I am not sure what this "mode" is called, but I am running Acrobat Pro DC on two different Macs. On Mac #1, I installed the app and got things working very quickly. I somehow managed to get all of the commenting tools across the top of the menu AND most importantly, was working in a commenting mode (if that is what it is called) where I did not have to constantly select buttons. For example, I could simply highlight a passage of text in the PDF and start typing and it would strike out the text I selected and add in the new text into a tex insertion comment.

I installed the app on my second Mac later today and NOTHING is working the same way. I have what seems to be a floating toolbar sitting to the left and I have to constantly go to this vertical toolbar and then select the tool I want to use and then go back and select the area and work from there. How do I get this more seamless behavior back on my second Mac??

Online help videos are useless as everyone has a menu bar that looks different than mine. The only other difference is Mac #1 is a newer Mac and is running Monterey, while Mac #2 is older and running Catalina.