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":
┌──Nathaniel Gallup (Stonington, New London Co., CT;chr.4 Jul 1692 - 3 Apr 1739)(m. 4 Jun 1717 Stonington, New London Co., CT) =>
┌──Thomas Gallup (26 Aug 1727 Stonington, New London Co., CT - Oct 1777 Plainfield, Sullivan Co., NH)
│ (m. 11 Aug 1748 Stonington, New London Co., CT)
│ └──Margaret Gallup (Stonington, New London Co., CT;11 May 1698 - 2 Mar 1761)(m. 4 Jun 1717 Stonington, New London Co., CT) =>
│
┌──Benjamin Gallup (Plainfield, Windham Co., CT;14 Jun 1758 - 11 Apr 1836)(m. 6 Dec 1781)
│ └──Hannah Dean (24 Mar 1722 - ?? Plainfield, Sullivan Co., NH)(m. 11 Aug 1748 Stonington, New London Co., CT)
│
┌──Benjamin Gallup, Dr. (12 May 1790 Plainfield, CT - 2 Aug 1864 Brooklyn, CT)(m. 28 Sep 1825)
│ │
│ │ ┌──Capt. John Gallup, IV (1676 Stonington, New London Co., CT - 29 Dec 1755 Sterling, Windham Co., CT)
1861 - Yes, date unknown
(Stonington, New London Co., CT;chr.4 Jul 1692 - 3 Apr 1739)(m. 4 Jun 1717 Stonington, New London Co., CT)