RCS rich card media height documented as optional

The media.height field on RCS rich cards was documented as if a value were always required. It is now clarified as optional, defaulting to SHORT when omitted.

What changed

Field	Type	Description
media.height	string	SHORT, MEDIUM, or TALL. Vertical cards only. Optional — defaults to SHORT when omitted.

This applies to vertical rich cards sent through the Messaging API. Horizontal cards are unaffected, since media.height only applies to the vertical orientation.

Where to look

• RCS message types and samples — updated rich card field reference
• Send message — API reference
• Send message batch — API reference