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":
Johann Streit (6 May 1804 Merzig, Merzig-Wadern, Saarland - ?? Iowa)(m. 31 Jan 1833 Hilbringen, Germany)
   └─Magdalena Streit (16 Nov 1838 Wehingen, Merzig-Wadern, Saarland, Germany -     18 Oct 1900 Clear Creek Township, Keokuk County, Iowa)
    Constantine Dionysius Buch, Sr (10 May 1832 Tunsdorf, Saarland, Germany - 5 Apr 1908 At Home on Farm, Clear     Creek Township, Keokuk County, Iowa)(m. 6 May 1858 Ss. Peter & Paul Catholic Church, Clear Creek Township,     Keokuk, County, Iowa)
       ├─Anna Rosalia Buch (2 May 1859 Talleyrand, Keokuk County, Iowa -        │ 27 Aug 1929 bur.Clear Creek Township, Keokuk County, Iowa)
       │ Peter Hammes, Sr. (26 May 1852 Feyen, Near Trier, Merzig-Wadern, Germany -        │ 20 Apr 1929 Keokuk County, Iowa)(m. 19 Apr 1877)
       │    ├─Helena Marie Hammes (1 Feb 1878 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 2 Sep 1954 Hospital, Wetaskiwin, Alberta, Canada) =>
       │    │ + Peter L Greiner (30 Aug 1871 Keokuk County, Iowa - 19 Sep 1935 Wetaskiwin, Alberta, Canada)
       │    │ (m. 31 Jan 1897 Ss. Peter & Paul Catholic Church, Clear Creek Township, Keokuk, County, Iowa)
       │    ├─Kathryn Theresa Hammes (30 Nov 1879 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 24 May 1880 bur.Clear Creek Township, Keokuk County, Iowa)
       │    ├─Nicholas Edward Hammes (4 Sep 1881 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 19 Feb 1951 bur.Clear Creek Township, Keokuk County, Iowa) =>
       │    │ + Anna Christina Goeldner (14 Jun 1889 German Township, Keokuk County, Iowa - 16 Oct 1925 bur.Clear        │    │ Creek Township, Keokuk County, Iowa)(m. 11 Feb 1908 Ss. Peter & Paul Catholic Church, Clear        │    │ Creek Township, Keokuk, County, Iowa)
       │    ├─Constant Peter Hammes (21 Jul 1884 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 27 Feb 1978 Keokuk County Hospital, Sigourney, Keokuk County, Iowa) =>
       │    │ + Lena Mary Vogel (18 Jun 1889 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 25 Jul 1985 Sigourney Care Center, Sigourney, Keokuk County, Iowa)(m. 22 Feb 1911)
       │    ├─Peter Joseph Hammes (22 Aug 1886 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 12 Nov 1939 At Home on Farm, Sigourney, Keokuk County, Iowa) =>
       │    │ + Teresa M Gries (15 Jul 1891 - 14 Nov 1934 At Home on Farm, Sigourney, Keokuk County, Iowa)
       │    │ (m. 20 Apr 1909)
       │    ├─Anna Margaret Hammes (22 Aug 1886 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 6 Jul 1958 Her Son Bernard's Home, Bettendorf, Scott County, Iowa) =>
       │    │ + Jacob C Vogel (8 Jan 1886 At Home on Farm, Clear Creek Township, Keokuk County, Iowa - 14 Apr 1934        │    │ At Home on Farm, Chariton, Lucas County, Iowa)(m. 22 Feb 1911 Ss. Peter & Paul Catholic Church,        │    │ Clear Creek Township, Keokuk, County, Iowa)
       │    ├─Mathias Jacob Hammes (9 Jul 1889 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 20 Feb 1921 At the Home of His Parents)
       │    ├─Michael Aloysius Hammes (26 Jun 1891 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 8 Feb 1967 Ottumwa, Wapello County, Iowa) =>
       │    │ + Cecelia Kathern Striegel (11 Sep 1893 - 27 Mar 1962 bur.Clear Creek Township, Keokuk County, Iowa)
       │    │ + Margaret Gabel (26 Dec 1889 - 24 Oct 1970)(m. 2 Oct 1962)
       │    ├─Cecilia Anna Hammes (8 Dec 1894 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 28 Mar 1961 Racine, Racine County, Wisconsin) =>
       │    │ + Michael Alfred Hammes, Jr (15 Mar 1889 Portsmouth, Shelby County, Iowa -        │    │ 12 Nov 1990 Racine, Racine County, Wisconsin)(m. 8 Apr 1912)
       │    ├─Zeno John Hammes (13 Sep 1897 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │    │ 20 Dec 1985 bur.Clear Creek Township, Keokuk County, Iowa) =>
       │    │ + Edna Mary Horras (14 Jan 1897 Keokuk County, Iowa - 9 May 1992 At Home on Farm, Clear Creek        │    │ Township, Keokuk County, Iowa)(m. 3 Sep 1918 Ss. Peter & Paul Catholic Church, Clear Creek        │    │ Township, Keokuk, County, Iowa)
       │    └─Margaret Mary Hammes (15 Sep 1902 At Home on Farm, Clear Creek Township, Keokuk County, Iowa -        │     5 Jan 1999 Washington County Hospital, Washington, Washington County, Iowa) =>
       │     + Walter John Reed (19 Dec 1901 - 4 Nov 1982 University of Iowa Hospital, Iowa City, Johnson County,        │     Iowa)(m. 29 Nov 1923 Ss. Peter & Paul Catholic Church, Clear Creek Township, Keokuk,        │     County, Iowa)
       ├─Mathias Buch (21 Dec 1860 - 30 May 1864 bur.Clear Creek Township, Keokuk County, Iowa)
       ├─Catharine Buch (9 Feb 1863 - 9 Aug 1863 bur.Clear Creek Township, Keokuk County, Iowa)
       ├─Constantine Dionysius Buch, Jr (21 Aug 1864 -        │ 29 Dec 1954 bur.Clear Creek Township, Keokuk County, Iowa)
       │ + Anna Peiffer (13 Apr 1868 - 12 May 1958 bur.Clear Creek Township, Keokuk County, Iowa)
       ├─Mary Buch (9 Jun 1866 - 1 Mar 1939)