How to resize your artboard to match the size of your Illustrator image
You’ve probably experienced the problem where you draw something in Illustrator and, when you are done, the artboard is way too big for the image. For convenience you need to scale down the artboard so it matches the size of your image.
Now you could go and grab the Artboard tool and start adjusting its size but there is an easier way. Start by selecting the objects on the artboard and then click the Artboard tool in the Tools panel twice. This opens up the Artboard Options Panel. From the Preset dropdown list choose Fit to Selected Art. The artboard will be instantly resized to fit the art on the artboard.
Click another tool such as the Selection tool to deselect the Artboard and you are good to go – you’ve cropped the excess artboard away from your artwork.