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":
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┌──Andrew Blackwood Billingsley
(1 Feb 1815 Bledsoe County, Tennessee, USA - │ 4 Mar 1889 Cold Spring, Bledsoe County, Tennessee, USA) =>
┌──John Trot Billingsley
(4 Jul 1848 Bledsoe County, Tennessee, USA - 14 Jun 1924 Tucumcari, Quay County, New Mexico, USA)
│ └──Susannah Jane Myers
(9 Jan 1827 Jefferson County, Tennessee, USA - 16 Sep 1908 Bledsoe County, Tennessee, USA) =>
│
┌──Patrick Henry Billingsley
(11 Nov 1880 Cold Spring, Bledsoe County, Tennessee, USA - 12 Apr 1953 Bledsoe County, Tennessee, USA)
│ └──Martha Josephine Schoolfield
(10 Nov 1849 Bledsoe County, Tennessee, USA - 7 Feb 1925 Pikeville, Bledsoe County, Tennessee, USA)
│
Frances Maurine Billingsley (26 Sep 1919 Bledsoe County, Tennessee, USA - 6 Dec 2004 Montgomery County, Ohio, USA)
└──Abbie Roena Lawson
(7 Dec 1889 Tennessee, USA - 19 Nov 1975 Pikeville, Bledsoe County, Tennessee, USA)