Layer options

Layer-specific options configure properties of the currently active rendering layer.

Main layer options control image layering.

Option
`l` or `layer`	Begin a new layer.
`src`	Provide a source image for the layer.

Masking and overlays

Mask and overlay options apply respective image-plus-image operations.

Option
`mask`	Apply a mask
`over`	Apply an overlay
`overcolr`	Tint an overlay image with a color
`overblnd`	Specify blending mode for the overlay

Text rendering options control the presentation of rendered text.

Option
`txt`	Provide text to render.
`fnt`	Configure text visual properties.

Group options allow to render layout in multiple independent canvasses that can be composited layer.

Embroidery rendering options control stitching files rendering.

Option
`thrd`	Provide embroidery rendering parameters.

Filter options allow to alter the presentation of a layer.

Option
`fx`	Provide filter rendering parameters.