How to Add to a Selection Using the Keyboard in Photoshop CS6
While working in Photoshop CS6, if your selection doesn’t quite contain all the elements you want to capture, you need to add those portions to your current selection which can be done using the keyboard.
For you keyboarders, to add to a current selection, simply hold down the Shift key and drag around the pixels you want to include when using the regular Lasso tool or the Rectangular or Elliptical Marquee tools. You can also hold down the Shift key and click the area you want when using the Magic Wand tool, or drag the area you want when using the Quick Selection tool.
To include an area that has straight sides in your selection, you can hold down the Shift key and click around the area when using the Polygonal Lasso tool. And although you may not have much need to do it, you can hold down the Shift key and click when using the Single Column or the Single Row Marquee tool. You shouldn’t use the Magnetic Lasso tool to add to a selection; it’s excessively cumbersome.
To add to your selection, you don’t have to use the same tool that you used to create the original selection. Feel free to use whatever selection tool you think can get the job done.
Follow these steps to add to the circular selection:
Make your first elliptical selection by selecting the larger circle with the Elliptical Marquee tool.
Be sure you hold down the Alt key (Option on the Mac) to draw from the center out.
To add the smaller circular area you will need to hold down two keys. Hold down the Shift key to add to the selection and then hold down the Alt key (Option on the Mac) to draw from the center out. You must press and hold down the keys in this order.
Drag around the smaller selection by using the Elliptical Marquee tool.Credit: ©istockphoto.com/slobo Image #9331276