Using Preview For Basic Image Editing

Preview app on Mac OS X Leopard is more than just for preview. You can use the Preview app for basic image editing such as cropping and sizing. These basic editing functions are often all you need for publishing images and photos to the web, there is no need to spend money for third party app.

### Changing image size

* Select from menu *Tools->Adjust Size…*

![OS X Preview app Adjust Size](http://sanziro.com/wp-content/uploads/2009/06/os-x-preview-app-adjust-size.png)

* In the dialog box that appears, enter the require size in pixels, percent, inches, mm, cm or points. You can even specify the resolution and choose not to scale the picture proportionally.

![OS X Preview App Adjust Size Dialog](http://sanziro.com/wp-content/uploads/2009/06/os-x-preview-app-adjust-size-dialog.png)

* Enter *Command-S* to save the changes. This will overwrite the image file. Select to save to different file if you want to keep the original.


### Cropping an image

* Choose the select tool from Preview’s toolbar. You have three options: rectangular, elliptical or lasso.

![OS X Preview App Crop 1](http://sanziro.com/wp-content/uploads/2009/06/os-x-preview-app-crop-1.png)

* Drag and select on the image the area you want to crop.

![OS X Preview App Crop 2](http://sanziro.com/wp-content/uploads/2009/06/os-x-preview-app-crop-2.png)

* Select from menu *Tools->Crop* or enter *Command-K* to crop the image.

![OS X Preview App Crop 3](http://sanziro.com/wp-content/uploads/2009/06/os-x-preview-app-crop-3.png)

* Enter *Command-S* to save the changes. This will overwrite the image file. Select to save to different file if you want to keep the original.

### Changing image orientation

![OS X Preview App Change Orientation](http://sanziro.com/wp-content/uploads/2009/06/os-x-preview-app-change-orientation.png)

Preview app offers four ways to change the orientation of image. The options are:

* Rotate Left
* Rotate Right
* Flip Horizontal
* Flip Vertical

Enter *Command-S* to save the changes. This will overwrite the image file. Select to save to different file if you want to keep the original.