ACTIVATING KEYBOARD SHORTCUTS
Keyboard shortcuts are enabled on a per-user setting, and can be turned on by visiting the Profile panel in Users → Your Profile. Check the Keyboard Shortcuts checkbox to enable keyboard shortcuts for comment moderation.
Please note, the keyboard shortcuts are designed to use both hands, simultaneously, on a QWERTY style keyboard layout.
The keyboard shortcuts are used for navigation and for actions. For any action to affect a comment, that comment must be first selected. The comment that is considered selected is indicated with a light-blue background. By default, no comment is selected, so, you will need to press either the letter j key, or letter k key, to start navigating.
Navigating comments is accomplished with the j and k keys. When you first visit the Comments page, no comments is selected, so, first press the letter j, or the letter k, to select the first comment. After that, just press the letter j to move the select to the next comment.
Note that if you come to the bottom of a page of comments and press j again, you will be taken to the next page and the first comment of that next page will be selected. Likewise, pressing k at the top of a comment page will zoom you to the previous page, selecting the comment at the bottom of that previous page. This makes it very easy to navigate through a long list of comments to perform the necessary actions.
For one of these actions to affect a comment, make sure the comment is first selected (see above).
Note that those first three actions (and most common actions) use the three left-most keys of the home row of a QWERTY keyboard. It is recommended that you shift your hand to the left so that your index finger is on d instead of on f, as is normal.
You can also perform an action on multiple comments at once. First, you’ll need to select the comments for the bulk action, using the x key to check the checkbox for the currently selected comment. Shift-x can be used to toggle the checkboxes, inverting their state. Once you have some comments checked: