I understand that you can set the size of an attachment under Home > Options > Attachments but my understanding is that this will make any image you upload have that thumbnail size if you choose to put a thumbnail into a post. If you set the size at 250 it will make all thumbnails 250x250. Is there an option to choose or set a custom thumbnail size. I might have a 1920x1080 image but i might want the thumbnail to be 900x180 I might also have 5 500x500 images and I want their thumbnail to be 180x150. Could this be done and is this possible, if not could I link a 900x180 thumbnail to a 1920x1080 and have that show as a lightbox? (the problem here is that if there are more then 1 image i can scroll though them with lightbox which I want my users and me to do) Anyone able to shed some light on this?