Transparency

Here are the typical methods for its use.

Applied to strokes, fills and brush strokes.
As a transparency gradient, again applied to either stroke or fill. Using the same principles as gradient editing, you can introduce an independent gradient transparency path using the alpha channel in your design. You can introduce more than two alpha levels along the gradient path, adjust where each stop is positioned and/or control alpha transitions.
As layer opacity.
As a layer effect property.
A group can also have an opacity setting independent of the objects contained within it.

Opacity is a term you'll see in Affinity Designer—this is the opposite of transparency. An object with 0% transparency is fully opaque (100% opacity), while 100% transparency means the object is invisible (0% opacity).

To change the opacity of an object's stroke or fill:

Select an object.
From the Color panel, drag the Opacity slider.

To change layer opacity:

From the Layers panel, select a layer.
Adjust the Opacity value.

To apply a transparency gradient to an object:

From the Designer Persona, select the Transparency Tool.
Drag across your object to apply a transparency gradient.

To apply layer effect opacity:

From the Layer FX panel, adjust the Opacity slider (if available).

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