Sometimes people post images here that are "too big." They make the page widen out past the width of your screen, so you have to scroll horizontally to see everything. That makes it very hard to read other posts on that page. Until now, what we've done about this has been rather complicated. Either the original poster or one of the mods had to find a smaller version of the image, or else download it, reduce it with image editing software, and post it to an image sharing site. Then the post would have to be edited to replace the "too big" picture's URL with the smaller one's.
But there is another solution. The last time this happened, our long-time member Dan Dassow made the suggestion in the thread to just edit the code with the image URL to set the width to a reasonable size. Since that image has now been "fixed," we've removed his post, but I thought I'd quote it here so everyone can see how it's done.
You can limit the width by adding the width qualifier as shown below, except remove the leading blank.
[ img width=300]http://www.syracusenewtimes.com/calendar/wp-content/uploads/2014/10/the-outlaw-josey-wales-original.jpg[/img]
See http://wiki.simplemachines.org/smf/Img for details.
The 300 was Dan's suggestion for this particular image, but it can be any figure up to about 600 or 800. It will depend on the size of your monitor whether it's too big to display correctly. I have a 21-inch monitor and it's set to a resolution of 1,680 x 1,050 pixels, so even a pretty large image is still OK for me, but that may not be true for everyone. When in doubt, err on the smaller side, and post a link (a regular URL link) to the full-size image if you like.
This is the image mentioned in Dan's post, constrained to a width of 300 pixels by the code he posted:

If you want to see the original "too big" image (1,920px × 1,080px), follow this link:
http://www.syracusenewtimes.com/calendar/wp-content/uploads/2014/10/the-outlaw-josey-wales-original.jpgThanks again for the tip, Dan Dassow!