There's no way to import a sheet from any other program, you have to build it from scratch. Roll20 also isnt as user-friendly as NBOS's designer - you'll have to get your hands dirty learning how to do coding in HTML and CSS (and maybe some Javascript). There are a lot of sheets already built. You can check them out by making a new campaign, and selecting one sheet after another, looking at thier pics. The best way would be to find one that looks similar to what you want, and then ask here for help on modifying it. Or post a request in the Sheet Request thread to see if anyone will build your sheet for you. it would be best to post a pic of your current NBOS sheet, and describe what sort of functionality you need. This is a long-shot. There are many more requests than there are designers, and sheets take a lot of work. If you do want to make your own sheet, you'll need to buy a Pro subscription. You cant create or edit sheets without it. As a last resort, if you want to play a game for which there is no sheet, you can play without a sheet. The Attributes and Abilities tab in each character can be set up to hold stats and dice rolls. It's not pretty, but it's what we all had to use before the Character Sheets feature was introduced.