When you copy an interior vertical line, the new line is halfway between the line you copied and the line to the right of the line you copied.
1	When	when	SCONJ	_	Case=Nom	3	mark	_	_
2	you	you	PRON	PERS-P2	_	3	nsubj	_	_
3	copy	copy	VERB	PRES	Mood=Ind|Tense=Pres|VerbForm=Fin	12	advcl	_	_
4	an	an	DET	IND-SG	Definite=Ind|PronType=Art	7	det	_	_
5	interior	interior	ADJ	POS	Degree=Pos	7	amod	_	_
6	vertical	vertical	ADJ	POS	Degree=Pos	7	amod	_	_
7	line	line	NOUN	SG-NOM	Number=Sing	3	obj	_	SpaceAfter=No
8	,	,	PUNCT	Comma	_	3	punct	_	_
9	the	the	DET	DEF	Definite=Def|PronType=Art	11	det	_	_
10	new	new	ADJ	POS	Degree=Pos	11	amod	_	_
11	line	line	NOUN	SG-NOM	Number=Sing	12	nsubj	_	_
12	is	be	VERB	PRES	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	0	root	_	_
13	halfway	halfway	ADV	_	_	16	advmod	_	_
14	between	between	ADP	_	_	16	case	_	_
15	the	the	DET	DEF	Definite=Def|PronType=Art	16	det	_	_
16	line	line	NOUN	SG-NOM	Number=Sing	12	obl	_	_
17	you	you	PRON	PERS-P2	_	18	nsubj	_	_
18	copied	copy	VERB	PAST	Tense=Past|VerbForm=Part	16	acl:relcl	_	_
19	and	and	CCONJ	_	_	21	cc	_	_
20	the	the	DET	DEF	Definite=Def|PronType=Art	21	det	_	_
21	line	line	NOUN	SG-NOM	Number=Sing	16	conj	_	_
22	to	to	ADP	_	_	24	case	_	_
23	the	the	DET	DEF	Definite=Def|PronType=Art	24	det	_	_
24	right	right	ADJ	POS	Degree=Pos	21	amod	_	_
25	of	of	ADP	_	_	27	case	_	_
26	the	the	DET	DEF	Definite=Def|PronType=Art	27	det	_	_
27	line	line	NOUN	SG-NOM	Number=Sing	24	nmod	_	_
28	you	you	PRON	PERS-P2	_	29	nsubj	_	_
29	copied	copy	VERB	PAST	Tense=Past|VerbForm=Part	27	acl:relcl	_	SpaceAfter=No
30	.	.	PUNCT	Period	_	12	punct	_	_
