Write the content of your post other than the images
Switch to 'HTML-editor' mode of the post editor area
Click 'BeforeAfter' button (This will start the '[beforeafter]' shortcode)
Add the photos to your post through the wordpress image/media uploader
1 photo should be left align when you insert the images on your post, the other one can be aligned right/center/none
The 'left-aligned' photo is taken as before photo so please align your photos accordingly
After you have inserted the two images in the post Click 'BeforeAfter' button again to close '[/beforeafter]' shortcode.
You can add more content to your post after closing the '[/beforeafter]' shortcode
The content other than image information withing the '[beforeafter]...[/beforeafter]' is ignored when the shortcode is executed, in other places like home page archive page the content will be shown as is in the post.
Requires: 2.9 or higher Compatible up to: 3.2.1 Last Updated: 2011-5-15 Downloads: 8,460