Hi, 
    The command I can find in the manual to show the syntax tree is (org-element-parse-buffer). However, when the structure is output to the buffer, by using the commands C-u M-: (org-element-parse-buffer), it seems that only the part up to a certain depth is printed. 

For example, if the current org buffer has the following content: 

#+TITLE: Hello World
Hello World!
* HEADLINE 1
** Sub-topic 
+ ItemA
+ ItemB
- Item1
- Item2
*** Sub-Sub-topic
\begin{equation}
    \label{eq:test}
    Bx=b
\end{equation}

When apply C-u M-: (org-element-parse-buffer),  the sub-sub-topic level is completely omitted in the printout: 

(org-data nil (section (:begin 1 :end 35 :contents-begin 1 :contents-end 35 :post-blank 0 :parent #0) (keyword (:key "TITLE" :value "Hello World" :begin 1 :end 22 :post-blank 0 :post-affiliated 1 ...)) (paragraph (:begin 22 :end 35 :contents-begin 22 :contents-end 35 :post-blank 0 :post-affiliated 22 ...) #("Hello World!
" 0 13 ...))) (headline (:raw-value "HEADLINE 1" :begin 35 :end 174 :pre-blank 0 :contents-begin 48 :contents-end 173 ...) (headline (:raw-value "Sub-topic" :begin 48 :end 173 :pre-blank 0 :contents-begin 62 :contents-end 173 ...) (section ... ...) (headline ... ...))))

What's the recommended way to show the syntax tree? Thanks. 

Shiyuan