Board Thread:Support Requests - Getting Technical/@comment-28602918-20160905211302

Could anyone tell me why this infobox is displaying that blank space on the right? I know it has something to do with me playing around with the width. I set it to 270px because I wanted to make an infobox that stays at the same width, rather than grow if you type long sentences in it.

Could anyone tell me how to fix it or even, if I dare be so presumptuous, do so for me and show me what they did? 