Image Comparison Views
Kaleidoscope helps you to find the changes in your image files by providing four different modes that are each designed to bring out the many different kinds of changes that are possible in image files.
You can switch between these views by using one of the following methods:
Choose between Two Up, One Up, Split or Difference in the View menu
Choose between Two Up, One Up, Split or Difference in the top toolbar
To change additional settings for the Image Comparison:
Go to Kaleidoscope > Settings… > Images
When you first add your image files, you'll see them displayed side-by-side in the Two-Up view. There are four image views to choose from:
Two Up
The Two Up view displays the images you are comparing side-by-side in a split view. You can change the orientation of the split view with the split view control in the bottom toolbar.
This view is good for spotting obvious changes.
One Up
The One Up view displays a single image at a time. You can select which image you want to view using the A/B selector in the bottom toolbar.
You can also animate the switching between image A and image B using the Play/Pause control in the bottom toolbar. Select the interval of the animation with the pop-up button next to the Play/Pause button.
This mode combined with animation makes even the smallest changes in image files pop out immediately.
Split
The split view overlays the two images on top of each other. You can adjust how much of each image is visible by moving the splitter control in the view.
This is a good view for comparing changes that affect every pixel of the image, such as image-wide levels and color adjustments.
Difference
The difference view is a special One Up view that highlights which pixels have changed between image A and image B. A difference mask is drawn over the image you are currently viewing. You can adjust the opacity of the difference mask using the opacity slider in the toolbar. You can also switch which image is drawn beneath the difference mask with the A/B selector.
Some changes in an image are very hard to detect with the eye. The difference mask will find them and highlight the pixels for you. Use this view to find changes that you can't see.
To change difference mask drawing options:
Go to Kaleidoscope > Settings… > Images
