oelle</span>@mastodon.social; my account on elekk.xyz is @<span>noelle</span>@elekk.xyz. If you're mentioning someone on a different instance, you have to type the whole thing (although the toot input box will help you auto-complete the username if it's a name the instance knows already). 

If you're mentioning someone on your own instance, you just have to type the first part; if you're on elekk.xyz, @noelle will get to me just like @<span>noelle</span>@elekk.xyz will. If you leave off the "@*instance*" Ma