Change The Width Of Your Landing Page Author: Mayank Agarwal | Read more posts by this author. A Quick Guide To Adjusting The Width Of Your Content On A Landing Page In SendX. SendX allows you to quickly change the width of your content on the fly with just a few clicks. This quick guide will show you how. Create a new landing page or edit an already existing one. Go to the Design tab. On the right hand side, in the drag and drop editor tool, go to the rightmost tab saying Setting, and use the Content area width slider to adjust the width of your landing page! And that's it! With just a few clicks you can adjust the width of your landing pages in SendX to fit your needs.