Clickable photo attachments

[Iris_Ford]

Is there a way to make an attached photo clickable and when someone clicks on it, the imaged to be shown at the original size (not resize) ?

I don't know how to exactly explain this.
I have a photography forum and my attachments are made to fit the post, but being a photography forum is important the size of the image to be the original one.

Is there a way to make the attachment clickable?

Thank you in advance.

[kh99]

I think to keep the photos the original size, they can't exceed the max file size and dimensions set for that attachment extension (set in the attachment manager). Then I believe what happens is if you click you get the "lightbox", then if you click on that you get the full size. But you can turn off the lightbox by going to Settings > Options > Message Attachment Options and setting "Use Image Lightbox" to No.