Sourcecode not viewable from cpanel browser

Hi Guys!

I hope this isn’t a redundant question (it seems like it might be a common issue), but I searched for my specific problem and couldn’t find anything.

Anyway, I’m very new to WordPress, and was recently added to help run a website hosted on WordPress. I’m trying to edit some pages, but (when I’m in the cpanel through my browser) I go to pages –> all, and locate a page I want to edit, the box that says ‘text’ (as opposed to visual) is empty. I assume the source code should be in there, but all of my pages are blank in that box. The site is otherwise functional, and the .php files from when I go to appearance –> editor are all viewable.

Is there something I’m supposed to download to my computer in order to access/change the source code for individual pages? I updated wordpress to 4.4 and that didn’t do the trick.

Thanks so much.