This is the screen for Weapon Abilities. Without clicking Edit, you can click on Weapon Types under Melee or Ranged to see which weapons can use that Ability.
Since you're not "editing" the ability, this screen is Read Only.
You can click on any item in the Name column to open the Viewer for that item.
Specific Weapons are in, as well as the Intelligent Items in the back of the DMG. They are put in as Unique Major Frequency rolled items.