Symbols is a powerful feature in Sketch that allows you to reuse elements easily across Artboards and Pages.
As you create a Symbol, you can automatically send a Symbol’s master to the Symbols Page. When you make a change to a Symbol’s master, the changes are applied to all Artboards and Pages in your document. In addition, each instance of a Symbol can be customized with overrides. In the video below, we’ve created a quick tutorial on how you can use Symbols to save time and improve your workflow.
A Symbol is a single layer that mirrors the content from its master. In the Layer List it is displayed with a purple icon with syncing arrows . A common example of a Symbol is an element that is re-used throughout your design such as buttons, or a cell in a table view.
Not only that, Symbol instances can be individually resized, and you can apply smart resizing rules to layers inside the Symbol to determine how they should behave when resizing.