After you move fields to the drop areas so that the drop area captions are covered up, you can still drag additional fields to the areas.
1	After	after	SCONJ	_	_	3	mark	_	_
2	you	you	PRON	PERS-P2	_	3	nsubj	_	_
3	move	move	VERB	PRES	Mood=Ind|Tense=Pres|VerbForm=Fin	22	advcl	_	_
4	fields	field	NOUN	PL-NOM	Number=Plur	3	obj	_	_
5	to	to	ADP	_	_	8	case	_	_
6	the	the	DET	DEF	Definite=Def|PronType=Art	8	det	_	_
7	drop	drop	NOUN	SG-NOM	Number=Sing	8	compound	_	_
8	areas	area	NOUN	PL-NOM	Number=Plur	3	obl	_	_
9	so	so	SCONJ	_	_	16	mark	_	_
10	that	that	SCONJ	_	_	9	fixed	_	_
11	the	the	DET	DEF	Definite=Def|PronType=Art	14	det	_	_
12	drop	drop	NOUN	SG-NOM	Number=Sing	13	compound	_	_
13	area	area	NOUN	SG-NOM	Number=Sing	14	compound	_	_
14	captions	caption	NOUN	PL-NOM	Number=Plur	16	nsubj:pass	_	_
15	are	be	AUX	PRES-AUX	Mood=Ind|Tense=Pres|VerbForm=Fin	16	aux:pass	_	_
16	covered	cover	VERB	PASS	Tense=Past|VerbForm=Part|Voice=Pass	3	advcl	_	_
17	up	up	ADV	_	_	16	compound:prt	_	SpaceAfter=No
18	,	,	PUNCT	Comma	_	3	punct	_	_
19	you	you	PRON	PERS-P2	_	22	nsubj	_	_
20	can	can	AUX	PRES-AUX	VerbForm=Fin	22	aux	_	_
21	still	still	ADV	_	_	22	advmod	_	_
22	drag	drag	VERB	INF	VerbForm=Inf	0	root	_	_
23	additional	additional	ADJ	POS	Degree=Pos	24	amod	_	_
24	fields	field	NOUN	PL-NOM	Number=Plur	22	obj	_	_
25	to	to	ADP	_	_	27	case	_	_
26	the	the	DET	DEF	Definite=Def|PronType=Art	27	det	_	_
27	areas	area	NOUN	PL-NOM	Number=Plur	22	obl	_	SpaceAfter=No
28	.	.	PUNCT	Period	_	22	punct	_	_
