Fiddlin' with Stuff

Tap the Edit button in the sources list (yeah, that thing) to unlock editing mode. From there you can tap on a source to tweak it, or tap the Add New Source row to conjure up a shiny new one.

Ditchin' It

Tap the red minus icon to summon a Delete button. Hit it & watch that source vanish into the digital void. Poof.

Tweakin' the Source

Tap on the source's name to crack open the Source Editor & work your magic on it.

Makin' a Fresh Source

Tap the bottom row to launch the Source Editor & fill in all the boring details for your brand-spankin' new source.

Tap the Done button when you've finally stopped messin' around with sources & actually pick one already.