You can easily remove the faint, dotted, cut-off line that indicates the end of a page in your visual.
You will notice that it is somewhere in the middle or end of your canvas. Here is what it looks like in the editor.
First, please click File in the editor. Then Page Setup - this is a simple way to remove the line.
Alternatively, you may choose to keep it there. Please note that the line is visible to assist anyone who needs an A4 or Letter paper size guideline for printing purposes. It will not appear on any downloaded or shared output. Thanks for being a great Piktochart-er! :)