How do I show different size pictures between Wordpress posts and the front page?

I have a Wordpress gallery and I would like to show thumbnails on the main page but bigger pictures on the individual post page.

Public Comments

1. You can automatically generate thumbnails and several sizes of images when you upload in the latest version of WordPress. Designate the size and shape in Settings > Miscellaneous. When you make or edit a post and insert a graphic from the gallery, you will see the option of which size image or to use or a thumbnail that links to the larger image.
2. you need a plugin like exec_php to do that, so you can call php code in your post. after the plugin installed, put this code in your post: <?php if(is_home()){ echo "<img src='http://linktoyourthumbnail' alt='thumbnail' />"; } else { echo "<img src='http://linktoyourbiggerimage' alt='biggerimage' />"; } ;> note: to make the plugin work properly, you need to do these: # Disable tag balancing ‘WordPress should correct invalidly nested XHTML automatically’ through the ‘Settings > Write’ menu in WordPress # Disable the WYSIWYG editor in the user’s settings through the ‘Users > Your Profile’ menu