If you want to completely remove iCloud Keychain sync and the information stored by it on Appleâs servers, simply follow these steps, starting on any one of your iOS devices or Macs that is using iCloud Keychain: iPhone, iPad, or iPod Touch. Go to and turn off âApprove with Security Codeâ.dding a new device to sync with iCloud Keychain. After setting up iCloud Keychain on one of your devices, you can add your other iPhone, iPad, iPod Touch or even a Mac running OS X Mavericks to your iCloud Keychain to sync all the stored information across all devices. Adding an iOS Device. 1  Go to.
Stands for Pages Per Minute.. PPM is used to measure the printing speed of both inkjet and laser printers. Most printers include a PPM rating for both black and color documents. These speed measurements are typically listed in the printer's technical specifications.his is because manufacturers measure the maximum PPM in the fastest printing mode, a.k.a. economy mode, which is also the lowest quality. When printing in regular mode, the speed may be twice as slow. When printing in fine or high-quality mode, the speed will likely be reduced even further.
Pixels per inch (ppi) - A measurement of image resolution that defines the size an image will print. The higher the ppi value, the better quality print you will get--but only up to a point. 300ppi is generally considered the point of diminishing returns when it comes to ink jet printing of digital photos. Dots per inch (dpi) - A measurement of printer resolution that defines how many dots of ink are placed on the page when the image is printed. Today's photo-quality ink jet printers have dpi resolution in the thousands (1200 to 4800 dpi) and will give you acceptable quality photo prints of images with 140-200 ppi resolution, and high quality prints of images with 200-300 ppi resolution.