Wow! Thank you for the super quick response. I am in Visual mode and I even have the Toolbar toggled to see both rows of options. (I did try toggling the Toolbar to the smaller setting to see if that helped any. I am going to go try turning plugins off an on to see if that helps.
I think I may have found the difficulty. I am using a plugin called The Events Calendar by Modern Tribe (free version). I was looking for the PTA drop down link while using that editor (as it looks just like the editor for pages and posts). When I went to add a new post or a new page, the PTA drop down link is there. So, I may just have to generate the shortcode on a page and cut and paste it into the event I am attaching the sign up sheet to.
Best Wishes,
Kim