Blend Layer Height
blend-h
Sets the height of the blend layer image. By default the image is drawn at its own size.
A value above 1 is pixels. On a still output that honors dpr, pixel values are multiplied by it, and an image layer drawn at its own size is scaled by it too; dpr does not apply to video output. A value of 1 or below is a fraction of the picture, less the pad on both sides. Setting only blend-h keeps the picture’s aspect ratio for the width.
Color layers always cover the picture, so blend-h applies to image layers only.
Aliases: blendh, bh.
Use blend-h[N] to target a specific blend layer, where N is 0–3. Layer 0 is either the bare blend-h or blend-h[0]; if both are supplied, the bare name wins.