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: James B Billingsley (Apr 1726 St Mary's County, Maryland, USA - 25 Jan 1776 Guilford County, North Carolina, USA)
Mother: Elizabeth Crabtree (5 Nov 1726 St Johns Parish, Baltimore County, Maryland, USA - 5 Nov 1839 McMinn County, Tennessee, USA)
John Billingsley, Sr
(17 Aug 1753 St Mary's County, Maryland, USA - 19 Sep 1844 Warren County, Kentucky, USA)
         ├─John Billingsley, Jr
(7 Apr 1786 North Carolina, USA - 12 Sep 1844 Warren County, Kentucky, USA)
         ├─Jacob Billingsley
(1795 Sullivan County, Tennessee, USA - Abt 1848 Tennessee, USA)
         │ + Rebecca Shipley
(Abt 1797 Tennessee, USA - ??)
         ├─Jesse Billingsley
(22 Feb 1774 Guilford County, North Carolina, USA - 28 Jul 1821 Jackson County, Tennessee, USA)
         ├─Mary (Polly) Billingsley
(1783 North Carolina, USA - ?? Illinois, USA)
         ├─Sarah Billingsley
(Apr 1773 Guilford County, North Carolina, USA - 16 May 1854 Blount County, Tennessee, USA)
         │ + Alexander Haile
(25 Sep 1768 Baltimore, Baltimore County, Maryland, USA - 7 Jul 1862 Blount County, Tennessee, USA)
         ├─Elizabeth Billingsley
(May 1776 North Carolina, USA - ??)
         ├─Thomas Billingsley
(1781 Onslow County, North Carolina, USA - Between 1852 and 1860 Sevier County, Arkansas, USA)
         ├─Samuel Billingsley
(11 Feb 1789 Onslow County, North Carolina, USA - 24 Feb 1882 Izard County, Arkansas, USA)
         │ + Ruth Haile
(1793 Baltimore, Baltimore County, Maryland, USA - 2 May 1832 Tennessee, USA)
         │ + Elizabeth Lewis
(1795 Tennessee, USA - 17 Apr 1857 Franklin, Izard County, Arkansas, USA)
         │ + Catherine Elizabeth Carr
(1 Dec 1800 South Carolina, USA - 30 Jan 1871 Franklin County, Arkansas, USA)
         ├─Jane Billingsley
(1792 North Carolina, USA - Aft 1860 Jackson County, Tennessee, USA)
         │ + Edward Mercer
(1787 Tennessee, USA - Abt 1860 Jackson County, Tennessee, USA)
         └─James Billingsley
(Aug 1778 Rutherford County, Tennessee, USA - Between 1854 and 1860 Monroe County, Kentucky, USA)
          + Rebecca or Sarah Haile
(1779 Virginia, USA - ??)