Go to [https://canva.com](https://canva.com) and log in to your account.
Select the design you want to add a gradient to.
Click the "Elements" tab on the left side of the screen.
Click the "Shapes" tab at the top of the Elements menu.
Select the "Gradient" shape.
Drag and drop the gradient shape onto your design.
Click the "Fill" tab at the top of the design window.
Select the "Gradient" option from the Fill menu.
Adjust the gradient settings to your desired look.