How to remove the background image using Preview

On duty blogger I have not infrequently work with images of different formats, to optimize photos and screenshots for the most beautiful display of articles in the blog. In particular, it is often necessary to remove the background image, that is, to make the picture clear. For such a simple, seemingly actions, many people are accustomed to use "heavy" editors such as Adobe Photoshop or PixelmatorEven not knowing about an easier way - c using the Preview program.

Frankly, up until yesterday I did not know about the existence of a systematic method of OS X to remove the background image and was very happy to find a description of this method at one Western Resources. The fact that a tool called "Instant Alpha"It is not in the most obvious place, but let's take first things first.

• Open the desired picture in the program Preview.
• If you want to keep the original image with the background, make a copy of the file using FIle -> Duplicate the system menyubare OS X.
• Activate the toolbar by using the pencil icon, select the button with the image of the dotted square, then select "
  instagram viewer
  Instant Alpha"As shown in the screenshot:

• Next, select the background area that you want to delete. To do this, hold down the left mouse button and slowly move the cursor to "capture" more pixels. The selected area will be painted red.
• When you're happy with the release, press the Delete key on the keyboard. If your image consists of several parts, the last two points need to be repeated several times.

For easier selection of pixels, you can use the built-in instrument approach - CMD + plus and CMD + minus respectively.

It is also important to note that if the source image format does not support transparency (for example, JPEG), the program will ask you to Preview to convert the image to an appropriate format.

Do you still have any questions on the background removal in Preview? Ask in the comments, always ready to help.