Gmail "Mark as Read": Shift + i
##Other useful keyboard shortcuts:
Other useful keyboard shortcuts:
Display a list of Gmail keyboard shortcuts: Shift + / or (?)
Select all unread conversations: *, then u
Also, you could map K to "Mark as read," just like in Yahoo mail. The "Custom keyboard shortcuts" Gmail labs feature lets you customize your keyboard shortcut mappings. It adds a new Settings tab from which you can remap keys to various actions.
...or you can add a "Mark as Read" button via another Gmail labs feature.