How to make simple boarders for signs?

Easel Easel Pro
1

I feel like there is some simple way to do with but im totally lost at the moment. I wanted to make a few signs for the house. But I think having a boarder might help make it pop a little better. How the heck can I make a basic boarder in Easel such as this…

2

I was trying to do much the same thing earlier this year, and Neil Ferreri was kind enough to create an animated GIF showing the steps. Here’s a link to that post - Square or Rectangle with"Internal Radius" Corners.