Hello @klaiya,
Using the default design, it will try to minimize the horizontal space by breaking the content of the cells at new-line breaks. This is the normal way that the ticket is viewed. However, when some cells have non-break-able text, that can increase the minimum possible width of the ticket view. In this case, the demo has a larger sum of minimum widths for all the columns combined. This causes the demo to have the horizontal scroll bar in order to show all columns.
If you want to have a scroll button like the demo, then it will happen when the content in your ticket fields have a combined minimum width larger than your screen allows. (You can also see this when you adjust the size of your browser window to a smaller size). To get around this default style, you can modify the style of your plug-in if you are familiar with PHP and WordPress optimization.
