The paper length is not relevant since the chart flows from one page to the next.
Mobile
in.
mm
Portrait
2.75
70
For smart phones, not for printing
Landscape
5.5
140
For smart phones, not for printing
USA & Canada
in.
mm
Letter Portrait
8.5
216
Also Legal Portrait
Letter Landscape
11
279
Legal Landscape
14
356
Also Ledger Portrait
Ledger Landscape
17
432
International
in.
mm
A5 Portrait
5.82
148
A4 Portrait
8.25
210
Also A5 Landscape
A4 Landscape
11.71
297
Also A3 Landscape
A3 Landscape
16.54
420
The Text+ programs assume that the right and left margins are each about 25mm (1/2 inch) wide.
On the Format for Printing page, differences in page margins can be accommodated by the "fudge factor":
Father: Maarten Stoker (Egmond aan Zee (NL);Sun 13 May 1821 - Tue 12 Jun 1906)
Mother: Adriana Blok (Egmond aan Zee (NL);Sun 28 Jan 1821 - Mon 24 Aug 1896)
Aagje Stoker
(Egmond aan Zee (NL);Wed 9 Apr 1856 - Sun 18 Feb 1940)
Jacob Zwart (Egmond aan Zee (NL);Wed 13 Feb 1861 - Mon 29 Jan 1940)
└─Cornelia Zwart (Tue 19 Sep 1893 Egmond aan Zee (NL) - Sun 5 May 1957 Velsen (NL))
Pieter Wijker (Tue 17 Nov 1891 Egmond aan Zee (NL) - de OK-kerk - Sun 9 Aug 1942 Den Helder (NL))
(m. Wed 5 Oct 1921 Egmond aan Zee (NL))
└─Guurtje Wijker (Thu 11 May 1922 Egmond aan Zee (NL) - Sun 26 Aug 1990 Velsen (NL))
Teunis Broekhuizen (Velsen (NL);Sat 5 Aug 1916 - Fri 30 Mar 2001)(m. Thu 18 Jul 1940 Velsen (NL))
1856 - 1940 (83 years)
(Egmond aan Zee (NL);Sun 13 May 1821 - Tue 12 Jun 1906)
Pieter Wijker 
