Feather spacing in headings to base align columns/pages

Hi,

Feather space in Headings is the important requirement in typesetting. For example, every heading requires "x" amount of above space, and "y" amount of below space. This is being configured in the Paragraph style designer. Is there any option to provide how much these "x" and "y" values can be negotiated (increase or decrease) in order to base align the column/pages. This feathering option is available in both 3B2 and LaTeX to configure. Unfortunately, this option is not available in InDesign too but we could make a script to achieve but this is unlikely. Are there any feature in FrameMaker to handle this feathering option?

Thanks in advance,

Saravanan