The main areas of LiveJournal customization for which support will be provided by support volunteers are:
Paid Member Style Creation/Editing/Use (excluding embedding uses, which will be handled by the Embedding Support group)
Override Customizations (for both paid and free accounts)
Customized Style Components such as color schemes, currents, mood themes, and other elements of styles that can be customized via means other than style editing or override. Some of the questions arising here probably belong in the general/unknown department; but many do touch on customization, and will be addressed in that context if appropriate.
Customization of Content. Ranging from some of the early FAQs dealing with making text bold to more advanced HTML/CSS, this area relates to localized customizations within each field, notably the event field.