transparent gradient in Keynote?
How does one make a transparent gradient of a shape in Keynote—a shape that is completely opaque on one side and completely transparent on the opposite side?
Draw then select the shape
Inspector > Format > Style > Fill > Advanced Gradient Fill (the Inspector is the side panel on the right)
Click on one of the two colour fill sliders to show the Colour Wheel
Drag the Opacity slider all the way down
lastly, in the advanced gradient fill, drag the colour fill slider that has the transparency set, drag the slider towards the centre to adjust the opacity from left to right