Standard letter tabs organise material alphabetically, while legal indexes may use letters, numbers, Roman numerals, exhibit labels, or specialised headings for structured case files and formal records. The right format depends on the filing system rather than the document subject alone. Confirm whether your organisation follows a required sequence, tab colour, printing style, or exhibit convention. Individual tabs can support custom arrangements, while collated sets help maintain a repeated structure across many files. The available legal index formats include several labelling and sequencing options for files that require more than a basic alphabetical arrangement.