why does preview’s Tools>Adjust Size menu option always seems to be greyed out, how am i with the Os supposed to get control over the DPI setting without resising the file so as to stop stupidly displaying images at print res on screen rather than the actual screen pixels ??!?!?! most content remains digital and doesnt get printed nowaday so why the osx team put an emphasis on print dpi within the OS, We as users should at least have some F***ing control over this ! thanks apple for presuming again you know better than the user !