No one is making requests, but there have been searches on this site about tests with different numbers of tails. So here, without ado, is how you specify whether a Fathom test should be one or two-tailed, and if one-tailed, which one:
First, check out this post about Fathom’s test objects in general. The key to specifying the tailed-ness of a Fathom test is in the relevant blue text.
When you read the text, find the phrase that’s about whether it’s one or two tailed and click on it. It’s a menu! Choose the appropriate phrase from the menu and you’re done! The Aunt Belinda test is shown.
If you un-check Verbose (in the Test menu), it looks like this: