Reuse elements throughout your artboards
To edit a symbol select a symbol on the artboard and press ↵ to locate it in the symbols page.
Alternatively you can find symbols in the components page on the left sidebar, right click and click edit and start making changes to your symbol
Note: Changing symbol parameters will automatically reflect in all instances where this symbol is used.
Symbol overrides makes it easier to change content without changing the master symbol. click on a symbol and start changing content and styles via the right side appearance menu.