MacBook Pro 17" Screen resolution really small, how change?

No, there isn't. On any LCD display, every resolution other than the maximum is unavoidably blurry. It's the nature of the technology: the LCD contains a fixed, unchangeable number of pixels (the native resolution), and using them to simulate any lower resolution results in an approximation, which is inherently only approximate — and "approximate" means blurry. This is true of every flat-screen display.

You have joined the club of sight-unseen buyers who learn, to their dismay, that they should have looked at the high-resolution screen before ordering. If you can't use it comfortably, return it while you still can, and order a 15" MBP with the standard-resolution (1440 x 900) display. The high-res 15" display makes things very nearly as small as your 17" does. There's absolutely no point in paying extra for a high-resolution screen if you don't want to use it at its highest resolution.