’Save Canvas as Transparent PNG’ command is a function that lets you save an image to your camera roll with all the white portion of the image turned transparent.
Prepare an illustration that you would like to save as a transparent PNG file.
Open ①the Layer window, scroll all ②the way down in your layers.
*You must do this step to save the file as a transparent PNG.
Tap on ①"…" button, and select ②"Save Canvas as Transparent PNG".
The file has been saved to your camera roll. It’s a lot more convenient to just load the file you just saved, and then add filters to them. Here, I will add a glow effect to the image using Gaussian Blur filter.
Once the file is saved, open ①the Layer window and tap on ②Import from Photo Library, to load the illustration you previously saved in your camera roll.
You will be asked, “Would you like to extract the line drawing?” Tap on ①Cancel to load the image.
Open ①the Tool Selection window and select ②Filter.
Select ①Gaussian Blur.
You can adjust ①the Radius by dragging the slider left and right. Tap on ②✓ to add the blur effect.
Open ①the Layer window and tap ②the blend mode, select ③Multiply.