@marisa59229 The reason designers use UI design tools like Sketch, Adobe XD, and Figma is because when you work directly in Editor X you are actually developing. In Editor X, you have to click several times to change the color of a button, for example. These UI design tools like Sketch, allow you to make design adjustments more efficiently. When you’re 100% happy with your design, move into Editor X to complete the functionality and start developing. This took me a while to implement but it’s worth it. As far as text sizes go here’s a great tutorial: Advanced Typography Design in Figma | Envato Tuts+