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":
Mother: Sidney Ann Horton (2 Aug 1858 Tishomingo County, Mississippi, USA - 28 May 1942 Fort Sumner, De Baca County, New Mexico, USA)
Hattie Carolyn Cooper
(22 Jan 1883 Erath County, Texas, USA - 24 May 1968 Carthage, Panola County, Texas, USA)
Henry Alexander Gillis
(15 Oct 1871 British Columbia, Canada - 17 Aug 1953 Carthage, Panola County, Texas, USA)
         ├─Henry Duncan Gillis
(16 Aug 1904 Tucumcari, Quay County, New Mexico, USA - 17 Feb 1983 Beckville, Panola County, Texas, USA)
         │ Charlcie Pauline Daniels
(10 Nov 1910 Carthage, Panola County, Texas, USA - 26 Dec 2007 Beckville, Panola County, Texas, USA)
         │          ├─Carolyn Virginia Gillis
(7 Nov 1947 Harrison County, Texas, USA - ??)
         │          ├─Charles Hugh Gillis
(21 May 1942 Beckville, Panola County, Texas, USA - 19 Feb 2012 Tyler, Smith County, Texas, USA)
         │          ├─Henry Daniel Gillis
(Beckville, Panola County, Texas, USA;4 Jul 1936 - 15 Apr 2010)
         │          └─Patsy Ann Gillis
(Abt 1933 Texas, USA - ??)
         ├─Ona Bell Gillis
(29 Apr 1907 Dodson, Quay County, New Mexico, USA - 26 Oct 1998 Longview, Gregg County, Texas, USA)
         │ + Truman Allen Rich
(5 Sep 1906 Carthage, Panola County, Texas, USA - 3 Jun 1992 Longview, Gregg County, Texas, USA)
         │ Lowell Philipps
(17 Jan 1901 Texas, USA - 10 Feb 1961 Longview, Gregg County, Texas, USA)
         │          └─Lowell Philipps, Jr
(Amarillo, Potter County, Texas, USA;17 May 1928 - 17 May 1928)
         ├─Charles Lee Gillis
(27 Sep 1911 Lubbock, Lubbock County, Texas, USA - 31 Jan 1949 Longview, Gregg County, Texas, USA)
         │ + Blanche Elizabeth Gordon
(4 Jan 1919 Las Animas County, Colorado, USA - 20 Jan 2010 Pueblo, Pueblo County, Colorado, USA)
         └─Leah 'Maude' Gillis
(18 Oct 1917 Jefferson, Marion County, Texas, USA - 17 Aug 1985 Longview, Gregg County, Texas, USA)