I read this in the FAQ's

the short answer: you can't change that other then giving out your forum URL with the /headlines directory after it. We may do more around this in the future.

And the long answer as to why:
Your forum's Headline page is sorta like the headlines of a newspaper. It features hot content for the day, from new posts, to new members, to recently embedded media. This is a unique feature on lefora like no other forum. Many other forum admins on other software must work hard to manually make this page for their own forum. Lefora does this for you automatically.

We realize that if you're very active in your forum, the Headlines page doesn't offer much value to you. The Headlines page is geared towards potential new members thinking of joining your forum or who want to get an overview of your forum. This is why we do something special - we redirect non-members and members to different places. Let's look at an example on the support forum.

If you visit support.lefora.com, and you're a member of the forum, you'll be re-directed to support.lefora.com/forum. If you're a non-member, you'll be redirected to support.lefora.com/headlines. Then once you join, you'll be treated as a member.

So all members of your forum are redirected to the "Forums" tab, all non-members are redirected to the "Headlines" tab.

Now, some admins ask us why they are always redirected to the Headlines tab even though they are a member. This is most likely due to the fact that you set a bookmark in your webbrowser for something like myforum.lefora.com/headlines. You simply need to remove the /headlines from your bookmark, and you'll be fine. When sending out links to your forum, remember to drop the /headlines or /forum, and just include your domain (i.e. shortname.lefora.com).