How can I edit custom fields to be required fields?
I have a Description text field that is used on a specific custom form that I want to edit and make a required field. I am the global admin, so I should have this right, but I am unable to find the means of doing this. Our company did work with a consultancy group to help with building out this form and streamlining some things, but that shouldn't matter. And when I look at other fields, I am unable to see a way to do much more than a basic edit of them. According to this link from last October, it should be as easy as going to Settings>Account Settings> then opening the Custom Fields tab. However, I am unable to find any settings or account settings options in my backend. In the screenshot provided, this is the extent of my options (I didn't expand the ones that could be, but Account Settings is not in any of them).
Am I overlooking something obvious?

Thank you for any help you can provide!
