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: John Henry Horton (14 Oct 1840 Tennessee, USA - 8 Jun 1912 Quanah, Hardeman County, Texas, USA)
Mother: Mary Carolyn Wilson (7 Apr 1844 Polk County, Arkansas, USA - 22 Feb 1946 Quanah, Hardeman County, Texas, USA)
Edgar Lee Horton
(6 Sep 1876 Farmersville, Collin County, Texas, USA - 30 Sep 1961 Quanah, Hardeman County, Texas, USA)
Nannie Bell Brannon
(4 Jul 1880 Dallas, Dallas County, Texas, USA - 17 Sep 1940 Quanah, Hardeman County, Texas, USA)
         ├─Kenneth Foy Horton
(18 Sep 1910 Quanah, Hardeman County, Texas, USA - 23 May 1991 Childress, Childress County, Texas, USA)
         │ Eula Mae Jackson
(12 Sep 1923 Walnut Springs, Bosque County, Texas, USA - 12 Apr 2008 Quanah, Hardeman County, Texas, USA)
         │                     + Living
         ├─Thomas Fred Horton
(Quanah, Hardeman County, Texas, USA;16 Jan 1916 - 29 Nov 1987)
         │ Juanita Willie Davis
(14 Apr 1918 Winters, Runnels County, Texas, USA - 24 Sep 2000 Quanah, Hardeman County, Texas, USA)
         │           Living
         │                    ├─Kenneth James Daughtry
         ├─Gordon Owen Horton
(12 Jan 1912 Quanah, Hardeman County, Texas, USA - 4 Jul 1992 Childress, Childress County, Texas, USA)
         │ + Ida Mae Taylor
(Quanah, Hardeman County, Texas, USA;2 Feb 1918 - 7 Sep 2008)
         ├─Nina Lee Horton
(Quanah, Hardeman County, Texas, USA;24 Sep 1906 - 2 Aug 1988)
         │ + Archie Weldon Tabor
(1 Sep 1902 Brown County, Texas, USA - 2 Apr 1973 Childress, Childress County, Texas, USA)
         │ + Bailey Mitchell Hicks
(24 Jan 1904 Oklahoma, USA - 5 Feb 1939 Childress, Childress County, Texas, USA)
         └─Gretta May Horton
(Quanah, Hardeman County, Texas, USA;24 Jun 1922 - 9 Apr 2007)
          Jimmy Collier Lindsey
(17 Oct 1922 Childress, Childress County, Texas, USA - 16 Nov 1987 Quanah, Hardeman County, Texas, USA)
                   ├─Joe Collier Lindsey
(21 Oct 1950 Quanah, Hardeman County, Texas, USA - 11 Jun 2009 Amarillo, Potter County, Texas, USA)
                   │ Living
                   │           + Living
                   └─Eddie Nan Lindsey
(11 Sep 1947 Quanah, Hardeman County, Texas, USA - 4 Oct 1993 Wichita Falls, Wichita County, Texas, USA)
                    Ray Leenier Turlington
(22 Aug 1942 Wilmington, Brunswick County, North Carolina, USA -                     13 Dec 2017 Wichita Falls, Wichita County, Texas, USA)