Joria, if you have your program set to keep proportions and resize the box with 1920 in it to 800, it should automatically change the second box to 450. 800x450 is still within the site guidelines and won't distort your image because that's the natural proportions for that size. 800x600 was more common with older CRT monitors that weren't widescreen. This size also won't make the post abnormally long and mess with any forum tables within the post.