I'll be covering this issue in depth soon in a separate article. All of the bars along the edges should be visible. The easiest way to tell is to check the PC desktop itself. To disable overscan, look for a 'wide' or 'aspect ratio' setting that allows you to see the full screen. You could lose part or even all of the menu bar along the bottom, for example. While this isn't great for regular content, it can be really annoying when displaying a PC's desktop. Most TVs have overscan turned on by default, meaning the TV zooms in slightly on the image. There are a few settings on the TV side as well. So if you're sitting too far from the screen, sometimes it's just going to be really hard to read/see what you're clicking on. Keep in mind, though, not all software has this ability. Otherwise, it's in the browser's settings. If you have a scroll wheel on your mouse, pressing 'Control' while you scroll up or down will make the size larger or smaller. Web browsers let you expand the size of Web pages, too, for the ones that don't do that automatically.

Other programs, such as Photoshop, have 'big' versions that you can enable in the settings, so you can see the icons and sliders. With Google Docs it's in the main bar along the top in the latest versions of Word (and Excel), there's a slider down on the bottom right. Word processing (Google Docs or Word) both allow you to change the size of the text (separate from the font size) for menus and other items. In Windows 8 you can do that, or just make everything larger. In Windows Vista and 7, you can change font size. Text will be hard to read, icons will be minuscule, so unless you're sitting really close, you'll probably want to make some adjustments.

If you've never used a high-resolution monitor before, the first thing you'll notice is that everything is really, really small. Previous versions of HDMI connections, like 1.4, are limited to 2160/30p. If you've just got HDMI, you'll need HDMI 2.0 on both ends (TV and video card) to do 2160/60p. With very few exceptions, TVs use HDMI, though a handful have DisplayPort. Game mode on: CNET tests TVs for input lag.Can 4K TVs make 'regular' HD content look better?.

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