Blend Alpha

Sets the opacity of the blend layer. Valid values run from 0 to 100, and the default is 100.

When blend-mode is a cut (destination-out or destination-in), blend-alpha controls how much of the picture the cut removes rather than the layer’s opacity.

Aliases: blendalpha, balph.

Use blend-alpha[N] to target a specific blend layer, where N is 0–3. Layer 0 is either the bare blend-alpha or blend-alpha[0]; if both are supplied, the bare name wins.