How to Resize Adobe Illustrator Artboard?

You can resize an Adobe Illustrator artboard in either of the following ways:

• With nothing selected, you can click on the "Edit Artboards" button in the "Properties" Panel (Windows > Properties), or;
• Click on the "File" tab, and then choose the "Document Setup" option. From the "Document Setup" pop-up window that opens, click on the "Edit Artboards" button (under the "General" tab).

Once the "Edit Artboard" options are visible, simply set the width and height of the selected artboard to resize it.