Administration > Environment Variables > APTHTMLPGBRKPAD — Controlling Page Break Space in HTML Output
  
APTHTMLPGBRKPAD — Controlling Page Break Space in HTML Output
Use this environment variable to control how much space is introduced into HTML output where the source document contains a FOSI generated or user-specified page break. Set the environment variable to the number of points of spacing to use. The default is 48 points. If the environment variable is unset, the default value is used.