The Zoom Button
The zoom button is the green orb on the upper left hand of windows in Macs. The zoom button behaves differently depending on the app - Finder and Safari sizes to best fit, iTunes’ zoom button switches between the mini player and the normal window, Mail goes full screen. Often times, the behavior differs from one app to another and many Mac users find this behavior inconsistent, unpredictable and disorienting to use. New switchers from PC to Mac might even find it a shortcoming of the operating system.
Part of the design philosophy of Apple’s Human Interface guideline, windows that are blown full screen is inherently inefficient, making dragging of content between one window to another rather cumbersome. Also, an apps window size is not always efficient on all kinds of display screens when blown full screen. Therefore, the zoom button’s behavior acts differently from one app to another, implementing a “best fit" behavior instead of just maximizing full screen.
In theory, this is a sensible philosophy. However, in practice - and in every day computing - this can be a crippling philosophy to adhere to, and sometimes maximizing windows manually to fit full screen when you need it can feel somewhat of a hassle.
Thankfully, RightZoom has come into the picture to automate this basic task for you in Mac OS X.