When you are logged in, you can click your profile picture at the top right corner of the screen and click your name to open profile, you can change the following settings:
Request email change (we will apply this form our side)
Color (shows in Placker views for cards assigned to you)
Allow account to be moved (if you want to connect Trello in another account)
Email notifications options (enable and select if you want to receive notifications one by one or grouped)
Disable chat option
Sync with other services
If you don't find the information you need, get in touch with the team using the chat.