Auto Sizing Basics
Auto sizing is a powerful feature that allows elements to be sized based on their contents.
The simplest example for auto sizing is a button. If you draw a simple Frame with some text and change the width and height from Fixed to Fit Content, the button will start to resize based on the size of the text.

Another common way to use auto sizing is for text blocks where you only auto size the width or height:

You can use these in many combinations to create every possible design that responds to size changes. It's important to note that all auto sizing is based on Stacks, using Flexbox under the hood.