The AutoCollage Image Preview Pane

This pane displays images selected via the Image Browser pane, and allows you to interact with them.

You can do the following:

Resize the Image Preview pane - for example by resizing the AutoCollage window - to redistribute loaded images throughout the pane.
Click on an image to zoom it by 200%. Mousing off the image before it finishes zooming leaves it zoomed. Mousing off the image after it reaches 200%, or clicking on the image again returns it to its original size.
Navigate through layers of 20 images at a time. Images are organized into layers of up to 20 images each. Hit F7 and F8, or scroll up or down with the mouse scroll wheel to navigate forwards and backwards through image layers.

Once you've selected Create, you won't be able to interact with images in the Image Preview pane until the collage is completed or cancelled.

The Image Preview pane displays the images selected via the Image Browser. You cannot cancel loading of images selected via the folder view or Windows Live Photo Gallery. To prevent a large folder from loading its images, click on a different folder in the Image Browser containing fewer images. To cancel images being added from Windows Live Photo Gallery, select the back arrow button on the Image Browser title bar.