Aspect Ratio Field 

Imaginator adds an Aspect ratios field to the content element's mediaAdjustments palette. It appears only on content types that render images.

The Aspect ratios field in a content element's Media Adjustments palette

The Aspect ratios field: each design-system breakpoint picks a ratio (or inherits the next-smaller one), previewed as a swatch.

The field stores a per-breakpoint ratio map as a JSON string, for example:

Stored aspect_ratio value
{"xs": "1:1", "md": "4:3", "lg": "16:9"}
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Keys are breakpoint aliases (md, lg, …) or literal min-widths in pixels (768; 0 is the base). A breakpoint that is absent or set to auto inherits the next-smaller ratio.

A value may also be a fixed CSS height ("600px") instead of a "W:H" ratio: that tier pins the height while the width climbs the ladder. Use for e.g. a full-width hero. See Fixed-height tiers.

Binding the field 

The raw column can be passed straight into the ViewHelper; no DataProcessor is needed:

Fluid template
<i:image image="{ref}" aspectRatio="{ce.data.aspect_ratio}"
         alt="{ce.data.header}"/>
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The ViewHelper decodes the JSON map and resolves it to per-breakpoint <source> tiers using the configured breakpoints.

Content Blocks 

When EXT:content_blocks is installed, the same field is available as a field type so block authors can declare it in YAML:

ContentBlocks field definition
- identifier: aspect_ratio
  type: AspectRatio
  allowedRatios: '16:9,21:9'   # optional; defaults to the full set
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allowedRatios is a comma-separated list of the ratios offered in the editor. Omit it to expose the full default set.