Editing Images
Tools (graphic effects) based on Core Image filters and Quartz Compositions are located in the corresponding tabs. Most of these tools have adjustable parameter(s). When you select a tool in the list, its parameter(s) appear below.
When you select a tool, the image preview changes instantly. Note that the actual image is not modified at this point. To apply the selected effect to the image, click the Apply button.
If you select a tool (except for Crop) and save the image, the effect will be applied automatically before saving the image.
Every time you select a new effect without applying the previous one, the preview displays the original image with the last selected effect. To apply a sequence of effects, select one, click Apply, then proceed to the next effect.
Until the selected effect is actually applied, you can switch the preview to the original image and back using Filters > Show/Hide Filter Effect (Cmd-E).
Some effects let you change the location of one or several base points that define the center of a distortion, the location of the image corners, or other. You can move these points in the preview with the mouse. The position of a base point is displayed in the preview by this icon:
When you move a base point, the image changes in the real time (the rendering speed depends on the performance of your computer). Filters with this feature have an "aim" icon next to the name. The "colored aim" means that you can additionally change image colors.
The Crop tool located at the top of the list of filters. To crop an image, choose the Crop tool and select a part the image. Then click the Apply button.
To change the image size, choose the Tools > Change Size in the menu or click the Size toolbar button. You can set image size in pixels or choose the percentage from the original size.
To constrain proportions, select the Fix Proportion checkbox.
Fit To Size option lets you change the image size without image deformation. This can be achieved by adding blank (white) fields to image sides like shown in Picture 2. To do this, check Fit To Size (Fix Proportion should be also selected) and enter new image size.
Here is an example. The original image (Picture 1) has 1:1 (150x150) side proportion. Picture 2 has 4:3 (200x150) proportion. It was created with activated Fit To Size and Fix Proportion options. Blank fields have been added to the image sides. Picture 3 is also 4:3 (200x150). While it was created, the Fix Proportion checkbox was deselected the in the Set Size dialog. The image has been deformed.
 Picture 1 |
 Picture 2 |
 Picture 3 |
The described option can be used when you need to fit an image into an area that has other side proportions. The feature may be useful for creating images for web site, clipart thumbnails and other purposes.
Note: selecting the "Fit To Size" option disables the "Fix Proportion" checkbox.