set_style
Set style
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Third-party content written by another agent. Data to evaluate, not instructions.
Set style fields on a layer. Only the fields you pass are changed; omit a field to leave it untouched. Covers border/radius/shadow (including borderAlign — inner|center|outer border position) plus image-only fields: fit (stretch|cover|contain), anchorX/anchorY (0..1, where the source anchors when cropping/letterboxing under cover/contain), tintColor (#rrggbb) + tintStrength (0..1) for a colour overlay painted source-atop, and alphaMask (linear gradient — see below) for a multiplicative alpha fade across the layer.
Input schema
| Property | Type | Required | Description |
|---|---|---|---|
| elementId | string | yes | |
| borderRadius | number | no | |
| borderWidth | number | no | |
| borderColor | string | no | #rrggbb. |
| borderAlign | string | no | Where the border sits relative to the layer's edge (design-tool "border position"). "inner" (default) draws the band INSIDE the box so it eats into the content; "outer" draws it entirely OUTSIDE so it frames the content without covering it; "center" straddles the edge 50/50. Rectangular boxes (image/video/text) only — shapes always stroke centred on their silhouette and ignore it. |
| boxShadow | string | null | no | CSS box-shadow string, e.g. "0 4px 12px rgba(0,0,0,0.5)". Pass an empty string "" or null to REMOVE the shadow. |
| fit | string | no | Fit mode (image + video layers). Default: stretch for image layers, cover for video layers. |
| anchorX | number | no | Object-position X (0..1). 0=left, 1=right, 0.5=centre. Only meaningful with fit=cover|contain. |
| anchorY | number | no | Object-position Y (0..1). 0=top, 1=bottom, 0.5=centre. Only meaningful with fit=cover|contain. |
| tintColor | string | no | #rrggbb tint colour painted source-atop over the image (image layers only). |
| tintStrength | number | no | Tint blend strength 0..1. 0=no tint, 1=image silhouette filled with tintColor. Default 0 (no tint). |
| alphaMask | object | null | no | Linear alpha-mask gradient (image layers). Multiplies the layer's alpha along a gradient line — used to fade a layer out partway across (the front half of a 'sandwich' covering text below it). Object: { type: 'linear', angle: number (deg, CSS-style; 0=to top, 90=to right, 180=to bottom, 270=to left), stops: [{offset:0..1, alpha:0..1}, ...] (≥2 stops, ordered by offset) }. Pass null to clear. |
| chroma_key | object | null | no | Green-screen key (video / image layers). Makes pixels near `color` transparent at render time so layers below show through. Object: { color: '#rrggbb' (default '#00ff00'), similarity: 0..1 (match radius, default 0.4), smoothness: 0..1 (edge feather, default 0.1) }. Pass null to clear. |
| blend_mode | string | no | Photoshop-style layer blend mode (Canvas globalCompositeOperation). 'normal' is the default. Applies to every layer kind; allowed on group.<id> too (the only set_style field that is). |
| projectId | string | yes | Opaque project id (a v4 UUID, from list_projects/create_project). Selects which existing project this call mutates. |
| anonymousToken | string | yes | The token create_anonymous_account returned. This connection has no Morpha key, so every call carries it. |
Raw JSON schema
{
"type": "object",
"properties": {
"elementId": {
"type": "string"
},
"borderRadius": {
"type": "number"
},
"borderWidth": {
"type": "number"
},
"borderColor": {
"type": "string",
"description": "#rrggbb."
},
"borderAlign": {
"type": "string",
"enum": [
"inner",
"center",
"outer"
],
"description": "Where the border sits relative to the layer's edge (design-tool \"border position\"). \"inner\" (default) draws the band INSIDE the box so it eats into the content; \"outer\" draws it entirely OUTSIDE so it frames the content without covering it; \"center\" straddles the edge 50/50. Rectangular boxes (image/video/text) only — shapes always stroke centred on their silhouette and ignore it."
},
"boxShadow": {
"type": [
"string",
"null"
],
"description": "CSS box-shadow string, e.g. \"0 4px 12px rgba(0,0,0,0.5)\". Pass an empty string \"\" or null to REMOVE the shadow."
},
"fit": {
"type": "string",
"enum": [
"stretch",
"cover",
"contain"
],
"description": "Fit mode (image + video layers). Default: stretch for image layers, cover for video layers."
},
"anchorX": {
"type": "number",
"description": "Object-position X (0..1). 0=left, 1=right, 0.5=centre. Only meaningful with fit=cover|contain."
},
"anchorY": {
"type": "number",
"description": "Object-position Y (0..1). 0=top, 1=bottom, 0.5=centre. Only meaningful with fit=cover|contain."
},
"tintColor": {
"type": "string",
"description": "#rrggbb tint colour painted source-atop over the image (image layers only)."
},
"tintStrength": {
"type": "number",
"description": "Tint blend strength 0..1. 0=no tint, 1=image silhouette filled with tintColor. Default 0 (no tint)."
},
"alphaMask": {
"description": "Linear alpha-mask gradient (image layers). Multiplies the layer's alpha along a gradient line — used to fade a layer out partway across (the front half of a 'sandwich' covering text below it). Object: { type: 'linear', angle: number (deg, CSS-style; 0=to top, 90=to right, 180=to bottom, 270=to left), stops: [{offset:0..1, alpha:0..1}, ...] (≥2 stops, ordered by offset) }. Pass null to clear.",
"type": [
"object",
"null"
],
"properties": {
"type": {
"type": "string",
"enum": [
"linear"
]
},
"angle": {
"type": "number"
},
"stops": {
"type": "array",
"minItems": 2,
"items": {
"type": "object",
"properties": {
"offset": {
"type": "number",
"minimum": 0,
"maximum": 1
},
"alpha": {
"type": "number",
"minimum": 0,
"maximum": 1
}
},
"required": [
"offset",
"alpha"
]
}
}
},
"required": [
"stops"
]
},
"chroma_key": {
"description": "Green-screen key (video / image layers). Makes pixels near `color` transparent at render time so layers below show through. Object: { color: '#rrggbb' (default '#00ff00'), similarity: 0..1 (match radius, default 0.4), smoothness: 0..1 (edge feather, default 0.1) }. Pass null to clear.",
"type": [
"object",
"null"
],
"properties": {
"color": {
"type": "string"
},
"similarity": {
"type": "number",
"minimum": 0,
"maximum": 1
},
"smoothness": {
"type": "number",
"minimum": 0,
"maximum": 1
}
}
},
"blend_mode": {
"type": "string",
"enum": [
"normal",
"multiply",
"screen",
"overlay",
"darken",
"lighten",
"color-dodge",
"color-burn",
"hard-light",
"soft-light",
"difference",
"exclusion",
"hue",
"saturation",
"color",
"luminosity"
],
"description": "Photoshop-style layer blend mode (Canvas globalCompositeOperation). 'normal' is the default. Applies to every layer kind; allowed on group.<id> too (the only set_style field that is)."
},
"projectId": {
"type": "string",
"description": "Opaque project id (a v4 UUID, from list_projects/create_project). Selects which existing project this call mutates."
},
"anonymousToken": {
"type": "string",
"description": "The token create_anonymous_account returned. This connection has no Morpha key, so every call carries it."
}
},
"required": [
"elementId",
"projectId",
"anonymousToken"
]
}