Not all keyboards are created equal. In fact, not all keyboards are even laid out the same (and we're not referring to the standard QWERTY key layout versus the Dvorak arrangement of some early ergonomic models). Most mainstream and gaming keyboards offer a 10-key numeric keypad at right. Rarely found on laptops smaller than 15.6 inches, keypads are a necessity for anyone who frequently tallies numbers or enters data into a spreadsheet. So-called tenkeyless or TKL models, especially popular in the gaming keyboard segment, slice off the numeric pad in the interest of saving desk space and keeping your typing and mousing hands closer together. If you want to go even smaller, so-called 60 percent keyboards eliminate even more extra keys. Check out our 60 percent keyboard guide for everything you need to know about them. Smaller distinctions include the placement of the cursor directional arrows and Home, End, Page Up, and Page Down keys. Additionally, most current keyboards have basic media-control features such as volume, play/pause, and next/previous track keys. These are typically dedicated buttons located above the numeric pad or built into the top row of function (Fn) keys as shared-key shortcuts. Bonus points if a keyboard maker implements the volume control as a dial or roller, as seen on some high-end Corsair, Das Keyboard, and HyperX models. If you prefer an unusual keyboard layout or just want to switch up a key or two, you may want to remap your keyboard. Our guide to keyboard remapping on Windows explains how to go about doing that. To help stave off carpal tunnel syndrome and repetitive stress injury, many keyboards are available with designs that put your hands into a neutral position as you type. The result is not only greater comfort, but reduced stress to joints and tendons, ultimately helping you avoid painful inflammation and the potential for expensive surgery. Ergonomic features can range from the simple (padded wrist rests) to the elaborate (a key layout sculpted to curve and slope, or a split design). One very important ergonomic feature to look for is the ability to perform angle adjustment. This is usually accomplished by folding or flipping two plastic feet on the back of the keyboard to alter its angle relative to your wrists and forearms. Many keyboards—not only models designed specifically to be ergonomic—have these feet, and research has shown that the traditional uphill tilt is actually not ergonomically ideal. It's better to experiment with them until your keyboard is flat or even angled slightly away from your wrists. (See our guide to ergonomic keyboards.)