Set the desired size for your images on the Settings > Media page BEFORE uploading your images to your post or page
Open the editor of the post or page where you want the gallery to appear
Upload your picture(s) by clicking the Add media-button just above the buttonbar. DON'T USE the Insert into post button, the images are automatically connected to the post. The zoom effect depends heavily on the resolution of the image you upload; a bigger original gives a better zoom effect.
Add the shortcode [sabineszoom] to your post or page
By default the large image is used, use [sabineszoom showsize=medium] if you want the medium size or [sabineszoom showsize=thumbnail] for the thumbnail
Publish the post or page.
Requires: 3.5.0 or higher Compatible up to: 3.5.2 Last Updated: 2013-4-28 Downloads: 1,264