* You don't have to use the same type of paste as me. You'll find more information here.
** This is a part of the Seahorse Tutorial, that is why the templates start from 31. The templates will help you with the sizes and shapes. You'll find them in the 'TEMPLATES' tab at the top of the page. You'll find information on how to use them here.
If you feel that the templates are restricting you, don't stick to them rigorously - instead of that treat them as a general guide only.