Basic Windows procedures.
Such as...
open Notepad, go to File, Open, browse to html file, open.
or
right click html file, select Open..., select Notepad program.
Be sure you understand that manual edits are lost after Publisher edits and
are discouraged by this MVP.
David Bartosik - [MSFT MVP]
www.publishermvps.com
www.davidbartosik.com