What operating system and Adobe Acrobat product are you using?
I'm using Adobe Acrobat DC on a PC running Windows 10
You can't remove this arrow. What you can do is not use a drop-down field at all, but a button field with a script attached to it that displays a pop-up menu with the options, and then populate the selected option as the caption of the button or to a separate field (a text field, for example). All of this requires some scripting know-how, though.
Just a small clarification: The arrow of a drop-down field can be removed, if you set the field as read-only, but then the user won't be able to change their selection, which is probably not what you want...
How would I go about doing that?
Gah - we had a sheet that worked perfectly and was created in LifeCycle designer. But now that we had to create it in Adobe instead, we can't get it to work correctly. One small change to the sheets and now they're completely messed up. Ugh!
It's important to know that LCD and Acrobat forms are completely different things, even if they might look the same and are both PDF files. I would recommend using only Acrobat forms, as LCD is on it's way out, and is becoming more and more difficult to support, and less and less usable by the end-user.
When is Adobe going to fix this, and by fix I mean "Make it so it acts the way it has in every other version of Acrobat and Windows I've dealt with since XP". I mean, "You have to learn to script of hire someone to script this for you" is FAR less than optimal when apparenlty a long standing feature has turned into a bug. It would have been nice to know before upgrading computers to Windows 10, I would have held onto a Windows 7 machine JUST FOR PRINTING THIS DOCUMENT CORRECTLY because, clearly, that would have been less time consuming and far cheaper than the only solution offered up here.
What kind of fix does you mean?