Clipping Mask

The clipping mask is a great way to populate a template. Most available templates use clipping masks. It gives you flexibility to “crop” your image. Be sure to have the “Auto Select” box in the option bar checked for the Move tool and select Layer in the dropdown, that way  you just have to click on the place holder to select it and make it the active layer. Now, when you drag your image into the template, it will be in the proper position to Clip it with a Ctrl/Cmd + Alt + G. To resize, use Free Transform (Ctrl/Cmd + T) and grab a corner handle and hold Shift to constrain proportion and not distort the image.

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