The CSS management features in Dreamweaver make it easy for you to move CSS rules to different locations. You can move rules from document to document, from the head of a document to an external style sheet, between external CSS files, and more.
Move CSS rules to a new style sheet
Move CSS rules to an existing style sheet
Rearrange or move CSS rules by dragging
In the CSS Styles panel (All mode),
select a rule and drag it rule to the desired location. You can
select and drag to re‑order rules within a style sheet, or move
a rule to another style sheet or the document head.
You can move more than one rule at a time
by Control‑clicking (Windows) or Command-clicking (Macintosh) multiple
rules to select them.
Select multiple rules before moving them