Component plugin: iframe not responsive to content height (Height = Auto), and cannot display images from Appian document storage

1. Responsiveness / iframe height (main priority)I have a custom component plugin  that loads in an Appian interface. The plugin’s UI is responsive (e.g. adapts to mobile and different breakpoints), but the iframe and field layout do not adapt to the content height.

• In the interface designer I set the component Height to Auto.

• The parent div gets the class CertifiedSAILExtension---height_auto, but the iframe still has an inline style like height: 270px !important; overflow: hidden;.

• So the plugin content grows vertically (and is responsive), but the iframe stays at a fixed height and does not grow with it. Content is cut off or overflows below the visible area.

The JavaScript API reference (e.g. 25.3) only documents how to receive the height parameter via Appian.Component.onNewValue(); I don’t see any documented way for the component to report its content height so the host can resize the iframe (e.g. a setHeight or similar).Questions:

• Is there a supported way for a component plugin to tell Appian the content height so the iframe resizes when Height is set to Auto?

• If not, is using a fixed height (Short / Medium / Tall) the recommended approach?

I’m currently using Tall (840px) as a workaround so the iframe has enough space, but I’d like to know if dynamic height is supported or planned.

2. Images: external URLs vs Appian document storageThe same plugin can render images from external URLs (e.g. https://...) without issues, but I cannot display images stored in Appian (e.g. from a Document or related storage).Question:Is there a supported way for a component plugin to show images that come from Appian document storage (e.g. a document ID or a URL that requires Appian auth)? For example, should the interface pass a different kind of URL or token that the plugin can use in an <img src="..."> or similar?

Summary: I’m looking for solutions for both: (1) iframe responsive to content height when Height = Auto, and (2) displaying Appian-stored images in the plugin. My current priority is (1) responsiveness.Thanks in advance for any guidance or documentation links.