Topic: Can't make a template

Please add more details in your help file.
I need you to go through step-by-step how to make a template and add it.
I have tried a number of different ways and can't get it to work. I can't spend any more time on this.
I want to use your software to draw simple UML diagrams. I need to make a box like "SideBars".
It is a simple rectangle, but with one horizontal line about 25% down from the top line. I also need to be able to add text to it. (I can't get this to work.)

Ideally I would like to add text in both parts of the box.