The Horizontal (or Vertical) Layout Group functions both as a Layout Controller and as a Layout Element. Why use a Horizontal Layout Group? Well, it could have been a Vertical Layout Group as well - as long as there is only a single child, they produce the same result. You can add and tweak padding using the padding property in the Horizontal Layout Group.
Set the Horizontal Fit, the Vertical Fit, or both to the Preferred setting. In order to do this, first add a Horizontal Layout Group to the UI element, then add a Content Size Fitter too. If you have a UI element, such as a Button, that has a background image and a child Game Object with a Text component on it, you probably want the whole UI element to fit the size of the text - maybe with some padding. Fit to size of UI element with child Text For example, if the pivot is in the center, then the element will expand equally in all directions, and if the pivot is in the upper left corner, then the element will expand to the right and down. The pivot will stay in place when the element is resized, so by setting the pivot position you can control in which direction the element will expand or shrink. When UI elements are automatically resized to fit their content, you should pay extra attention to the pivot of the Rect Transform. A Content Size Fitter is a type of Layout Controller, which listens to layout information provided by Layout Elements and control the size of the Rect Transform according to this. In a manual layout this information is not used. What happens here is that the Text component functions as a Layout Element that can provide information about how big its minimum and preferred size is. Then set both the Horizontal Fit and Vertical Fit dropdowns to the Preferred setting. In order to make a Rect Transform with a Text component on it fit the text content, add a Content Size Fitter component to the same Game Object which has the Text component. This can be done by adding a component called Content Size Fitter. However, sometimes you may want the rectangle to be automatically sized to fit the content of the UI element. Normally when positioning a UI element with its Rect Transform, its position and size is specified manually (optionally including behavior to stretch with the parent Rect Transform).
Making UI elements fit the size of their content
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