READ ABOUT Best Practices on deploying FileMaker WebDirect by Michael Westendorf.
Tip: Each time you change the appearance of any of your objects without saving those changes to the theme, you are creating a local style. Local styles add to the overhead required to render your layout, putting more workload on the server and client. Because of that, you should try to avoid using the format painter and copying and pasting of layout objects. Doing so does not retain the style of the original object and instead creates a new local style.
[Editor note: Please welcome Kevin Hammond, President of DB Services, as a new guest blogger on FileMakerProGurus.com]