RRGbank

To change a label, click on a node to select a different label from a list. The syntactic category and the function tag (before and after the dash "-") must be selected separately by clicking on the corresponding part of the label.
To add a function tag to a node that does not have one yet, drag it from the list of function tags onto the node.
Re-attach a node by dragging and dropping it on a new parent. This can be used to created discontinuous constituents.
Similarly, nodes can be removed and new ones added by dragging to/from below the tree.
Finally, the bracketing can be edited manually in the text box below the tree; press "validate" to update the tree. Whitespace is ignored. Each token must have a dedicated POS tag.

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(SENTENCE
  (CLAUSE
    (CORE
      (NP (PRO 0=It))
      (NUC (V 1=struck))
      (NP (PRO 2=me))
      (PP
        (CORE_P
          (NUC_P (P 3=as))
          (NP
            (OP-DEF 4=a)
            (CORE_N
              (NUC_N (N 5=way))
              (CLAUSE-PERI
                (CORE
                  (CLM 6=to)
                  (NUC (V 7=get))
                  (ADVP-PERI
                    (CORE_ADV (NUC_ADV (ADV 8=back)))
                    (PP
                      (CORE_P
                        (NUC_P (P 9=to))
                        (CLAUSE
                          (PrCS (NP-WH[PREDid=1] (PRO-WH 10=what)))
                          (CORE
                            (CORE
                              (NP (PRO 11=I))
                              (ADVP-PERI
                                (CORE_ADV (NUC_ADV (ADV 12=really))))
                              (NUC (V 13=want)))
                            (CORE (CLM 14=to) (NUC[NUCid=1] (V 15=do))))))))))))))
      (. 16=.)
      ('' 17=''))))

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Supertags

	token	arc	supertag
1	It	2	(NP (PRO <>))
2	struck	0	(SENTENCE (CLAUSE (CORE (NP ) (NUC (V <>)) (NP ) (PP ))))
3	me	2	(NP (PRO <>))
4	as	2	(PP (CORE_P (NUC_P (P <>)) (NP )))
5	a	6	(NP* (OP-DEF <>))
6	way	4	(NP (CORE_N (NUC_N (N <>)) (CORE )))
7	to	8	(CORE* (CLM <>))
8	get	6	(CORE (NUC (V <>)) (PP ))
9	back	8	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
10	to	8	(PP (P <>) (CLAUSE ))
11	what	16	(NP-WH (PRO-WH <>))
12	I	14	(NP (PRO <>))
13	really	14	(CORE* (ADVP-PERI (CORE_ADV (NUC_ADV (ADV <>)))))
14	want	16	(CLAUSE (CORE (NP ) (NUC (V <>)) (CORE )))
15	to	16	(CORE* (CLM <>))
16	do	10	(CLAUSE (PrCS (NP-WH )) (CORE#WRAP# (NUC (V <>))))
17	.	0	(SENTENCE (. <>))
18	''	0	(SENTENCE ('' <>))