Numerous different block types are recognized by casual-org-tmenu. They are:
#+BEGIN_SRC)
#+BEGIN_EXAMPLE)
#+BEGIN_QUOTE)
#+BEGIN_EXPORT)
#+BEGIN_CENTER)
#+BEGIN_VERSE)
The following screenshot shows the variant of casual-org-tmenu when the point is in the declaration for #+BEGIN_SRC.
If the point is within an Org source block, then the following menu variant is shown.