TAB SET DEFAULT
TAB SET literal_number
TAB SET literal_number %
TAB SET literal_number mm

The TAB SET command is used to change the number of tabs across the page and remains in effect until it is changed and / or reset to default.

Because tab sizes are still calculated using whole units, you may get fractional differences but when you specify a literal count of tabs, you will always get at least that many.

Examples:

TAB SET DEFAULT
TAB SET 10
TAB SET 50.00 %
TAB SET 20 mm