I compiled the following information after learning how to reuse an existing attachment as I thought it may be useful for other members. One is given the option to insert a thumbnail after an image has been uploaded into a post. The bbCode generated is: Code: [ATTACH]aNum[/ATTACH] where aNum is the attachment number assigned by the system When the same code is used in a different post, a thumbnail is not created, but rather a regular link with the text "View attachment aNum". In such instances a thumbnail can be created as follows: Copy the link location of the thumbnail in the original post or the link "View attachment aNum"; Click the position in the text where the thumbnail is to be inserted; Click on the Image icon, paste the location into the 'Image URL' field, then click Insert. By doing so, a copy of the original image is automatically uploaded into the post and a thumbnail is generated at the insertion point. (Credit to @wcutler for this workaround: How does one upload a photo from another posting?) @Daniel Mosquin For the sake of consistency, how about changing the size of the thumbnail created in this manner to match that of a manually uploaded image? Also, there is a related discussion in the Xenforo forums that may be of interest: Re-using attachments Note: The difference in size of the thumbnails in the following two posts is not apparent. The original is 225 x 168 pixels compared to 225 x 169 pixels of its copied counterparts. In a similar test using a portrait image the numbers were 168 x 225 pixels and 225 x 300 pixels respectively, resulting in a more noticeable difference.