When you have a Photoshop document that contains many layers and layer effects, it can sometimes take longer than you want to open. That’s the price you pay for convenience. But there are certain times when you simply want to save the PSD file for use on the Web or for another use that doesn’t require the added file size and convenience of the layers. You could open the file normally, then flatten the image via the Layers panel flyout menu, but that’s too much work. Instead, try this tip. You can open a flattened version of your layered Photoshop file simply by holding down the Option and Shift keys while double clicking the file in the Finder, or opening it from the Open menu in Photoshop. Note: In some rare cases, Photoshop may pop-open a dialog box asking if you wish to use the composite data. Just hit OK and let it open. I’m not sure why it does this, but I’ve found that it usually happens on older Photoshop files.