I got my new SP4 pen to use on my SP3 and I'm noticing that the top button isn't doing anything. It also wasn't doing anything on my old pen but I thought it might be dead batteries. I think I've seen problems like this so if anyone can direct me to the right thread. Also - the Windows 10 version of Surface app... is it me or is it missing features? I'm sure on the old app in win 8 it had more settings. I thought it had whether to use desktop or metro one note?? Or am I imagining things. Now all I get is pen sensitivity and windows button turn off or on nothing else, I 'm sure there was more to it before.