Use Preview to Edit On Your Mac (Part 2)

7/26/2012 3:38:50 PM

Step 10 - saturation and contrast

Instantly give your photos a boost by altering the saturation and contrast. Using the two simple slider controls found under Tools>Adjust Color, experiment and see how your image is improved. Remember to keep the effect subtle to look realistic!

Description: Step 10

Step 10

Step 11 – tinting with the eyedropper

Correct minor colour casts with the Tint slider in the Adjust Color palette. To ensure the colour is applied naturally, click onto the eyedropper icon next to the Tint slider, click onto a natural colour within your image then move the slider a small amount.

Description: Step 11

Step 11

Step 12 – colour conversion

Convert your photos to black and white or sepia using the sliders in the Adjust Colour palette. To convert to black and white, first desaturate by moving the Saturation slider left then boost the Contrast slider. Play with the Sepia slider for a traditional effect.

Description: Step 12

Step 12

Step 13 – magnifier tool

Zooming in and out of images and checking their quality can quickly get boring, but in Preview there is a fast way to do this. Go to Tools>Show Magnifier and move this circular zoom tool around to view details. To hide, simply click Tools>Hide Magnifier.

Description: Step 13

Step 13

Step 14 – opening RAW files

The newer your Mac OS X, the more RAW file formats it can open. Newer cameras may not be supported with older versions of Preview. With files open go to Tools>Show Inspector and all of the file information will be shown, including camera model used.

Description: Step 14

Step 14

Step 15 – extract an object

To extract an object from its background, click the Select drop-down menu. You can select by drawing around an object with the Lasso or Smart Lasso, or follow our guide on p56 to using Instant Alpha. You’ll be left with an active selection – just hit delete.

Description: Step 15

Step 15

Preview in detail - fine-tune your photographs

Preview contains a great selection of the most useful photo-retouching functions that people new to editing require


Moving this slider right a small amount will boost the depth of your photo for great results


Fix your under or overexposed photos by adjusting this simple slider


Under the histogram sits three pointers, slide these to alter the Levels within the photo

Auto levels

Auto correction saves time, however it’s not as accurate as your own eye


This feature can remove or boost colours in a photo. A quick and simple way to convert to black and white


A traditional effect still used by many. Try it out on portraits or wedding photographs


This tool adds a warm or cool tint to your whole image, perfect for summer snaps


Banish colour casts by sampling a neutral colour in the photo with the eyedropper

Reset all

If you’re unhappy with your edits, this button will revert back to the original photo


Improve the quality of your image with this slider. Small tweaks make a big difference

The Instant Alpha tool – use this simple technique to delete unwanted backgrounds

Step 1

Click the select button located in the toolbar and from the drop-down menu choose Instant Alpha. This tool works by selecting pixels of similar tones and placing them into an active selection.

Description: Step 1

Step 1

Step 2

To select pixels, click onto the background and drag over a tiny area, you may want to zoom in closer for better accuracy. An active selection will appear with some of the background in it.

Description: Step 2

Step 2

Step 3

Hit delete and the background will vanish, repeat the process, dragging the tool over small areas of pixels and hitting delete. Zoom in and work slowly around the edges of the object.

Description: Step 3

Step 3

Create slideshows in preview

Preview has an in-built slideshow feature and it allows you to use images that you have stored in your iPhoto library or from elsewhere on your computer. Open up the images you wish to display proudly, then it’s as simple as pressing a button and watching the show.

Step 1 – set your preferences

Before opening any images, open up the program and click on Preview in the top bar, then go to Preferences. In this dialog window check ‘Open all files in one window’.

Description: Step 1

Step 1

Step 2 - Open you files

Go to File>Open, then in the sidebar of the dialog box go to Media>Photos. Here you can select images from iPhoto. Cmd + click which images you want to open and hit Enter.

Description: Step 2

Step 2

Step 3 - View your photos

With your images open, there’s no need to highlight the photos, just go to View>Slideshow and watch your photos display full-screen. Play around with the controls to suit.

Description: Step 3

Step 3

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