You can find many more tutorials about Google Slides in our blog. So to make border color transparent, click the. You can add more transparency gradients to the image or enlarge and reduce the size of the gradient by modifying the size of the shape. If your image or shape has a border, you can opt to make it transparent so that it matches the overall aesthetic. Finally, just customize and adapt the gradient as you see fit.When we are done, we click OK and we can see the final result, with the image with its gradient transparency. Let's adjust the colors and the degree of transparency of the shape.To do this, we select Fill Color > Gradient and start creating a custom gradient. We continue with the gradient of the shape.In the example, we have chosen a rectangle. Select the shape you want your transparency gradient to be. Let's make the transparency gradient from a shape.This goes on and on! If you want to continue playing with the transparencies of an image, but in an even more original way, you can make a part of the image transparent, achieving a gradient effect.