So where do you find our gradient feature:
Mark your layer
NB: A little note is that gradient is not able to apply to box shadows or element borders
Go under "Edit"
Click on the little colored square under "Transform"
Choose "Linear" or "Radical" from the drop-down menu
To add a color you simply click the space underneath your color spectrum
Click on the new color square and choose the specific color for your gradient as you normally would
You can add up to 20 colors to the individual element
Move the colors around by dragging the squares
The closer together the sharper the line between them will appear and the further away from each hour they are placed the more blended the colours will be.
Delete a color square by simply double tapping it
Linear vs. Radical
Linear gradient pattern where you can decide the angle of the gradient by using the little circle icon under the color picker.
Radical will have the colors will start in the center and go out in a circular gradient pattern.
Opacity with Gradient
To control the opacity of your whole layer, you will need to use the Opacity settings under "Transform"
To change the opacity of only a certain color in your gradient
Happy coloring π