Insert a canvas. The easiest way to create a flowchart in Word is to first create a canvas. A canvas allows more freedom to work with shapes, and enables some features that aren’t normally available, such as connecting lines.
Click the Insert tab. Select the Shapes menu, and then click New Drawing Canvas at the bottom of the menu. A dotted outline of the canvas will appear in your document. You can adjust the size of the canvas by manipulating the corners