Raymarine s award winning eSeries Multifunction Displays MFDs. These displays can be a single allinone Chartplotter GPS or be networked with Sonar, Radar. Our bestselling Kindle. 6 highresolution display with builtin lightprovides crisp, laser quality text with the highest resolution of any ereader. I have been noticing some dead spots on my touchscreen recently. And I really didnt mind it before. But today, the upper left portion of the screen. Calibrate the Touchscreen on your Surface Love My Surface. This may have happened to you You click on a button or menu option and miss. Maybe youre using Fresh Paint and notice that your Surface Pro stylus is drawing just a little to the left. The cause Your touch inputs are out of calibration. The touchscreen and pen inputs on your Surface are pretty accurate out of the box so, you may not have seen any problems with this. However, that doesnt mean it wont happen in the future. Fortunately, its an easy fix that you can do in less than two minutes. The same procedure works for Windows 8 and Windows 1. Windows RT as well but you wont get a prompt for Pen or Touch Calibration. Search for calibrateTap on Calibrate the screen for pen or touch inputThe following screen will appear. Tap on Calibrate. When you do, youll get the following window. The procedure for doing the Pen or touch inputs are similar so select which one you want to calibrate. For this example, Im going to do Touch Input. Next youll see a screen a lot like the one below I enlarged the text to make it easier to readStart in the upper left corner and touch or tap with the pen the cross hairs as they appear. There will be 1. 6 in all. If you make a mistake, right click on the screen to back up and try again. After youre done, youll get a popup asking if you want to save your configuration. Tap OKRepeat for the touch or pen input as needed. Thats it. Hopefully, you wont need to do this very often but if you do, now you know what to do. Let me know if this helps you at some point and dont be afraid to post a comment if you have any questions. Unfortunately, only software in the Windows Store can be added to a Surface RT tablet. Have you checked the manufacturers website for the external touchscreen you.