To change the default border, cellspacing, and cellpadding values for all tables:
[Tables]
; Border, Spacing and Padding defaults for full table
Border=3
Spacing=2
Padding=6
The values for Border, Spacing, and Padding specified here become the values for HTML <table> attributes border, cellspacing, and cellpadding, respectively.
§33.4.8.2 Taming border, cellspacing, and cellpadding settings
§33.4.8.3 Excluding border, cellspacing, and cellpadding attributes