Final answer:
Double-click any instance of a symbol to edit it and the changes will automatically apply to all instances on the artboard, saving time and maintaining consistency in design.
Step-by-step explanation:
To edit a symbol in design software and update all instances of that symbol on the artboard, you would generally double-click on any instance of the symbol to enter symbol editing mode.
Any changes you make to the symbol will automatically be applied to all instances of the symbol on your artboard. This maintains consistency across your design and saves time when you are iterating on your symbol's design. Once you're finished editing, simply exit symbol editing mode and you'll see that all instances of the symbol have been updated to reflect the changes. It's a powerful feature that streamlines the design process.