How to set the images size in the forum?

There is a forum, but because of the insert image on the forum, the page begins to appear crooked, how can I improve?
July 8th 19 at 12:01
2 answers
July 8th 19 at 12:03
As an option
position: relative;
width: 100%;
but it is better to put a preview, not such a massive picture
It's like finally to do in a panel? Admin panel (vBulletin 3.8.7 Patch Level 3) - Alexandria.Labad commented on July 8th 19 at 12:06
It's not in the panel, and using css - Bernie commented on July 8th 19 at 12:09
July 8th 19 at 12:05
DВсе is still not clear, looking in the CSS forum, but could not find, is there anywhere else?

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