A Guide to TDA   Where to start Rules & FAQs - This section will teach you everything you need to know about using TDA. Post a Welcome Thread - Introduce yourself to everyone at TDA. Birthday List - Post your birthday and get added to our list. Profile - Fill out your profile with whatever information you want to share. Avatar - Your avatar can be uploaded from your profile. It can be any image you choose that follows our rules. They are square, usually between 100x100px and 200x20