---
title: "Add selection points to a Kling multimodal session"
method: POST
path: "/kling/v1/videos/multi-elements/add-selection"
---

# Add selection points to a Kling multimodal session

`POST /kling/v1/videos/multi-elements/add-selection`

Place normalized point coordinates on a chosen frame within the current session.

## Request body

- object
  - `session_id` string, required — Selection session id returned by init-selection. Follow-up calls must use the same account and exact session id.
  - `frame_index` integer, required — Frame number Supports adding up to 10 marked frames, meaning video selections can be marked based on a maximum of 10 frames. Only 1 frame can be marked at a time.
  - `points` object[], required — Click coordinates, represented by x and y. Value range: [0,1], expressed as a percentage; [0,1] represents the top-left corner of the frame. Supports adding multiple marked points simultaneously, with a maximum of 10 points per frame.
    - `x` number
    - `y` number

## Response `200`

Selection updated.

- object
  - `code` integer, required
  - `message` string, required
  - `data` object

---

[API](https://skmtc.net/cometapi/apis/create-api-key.md) · [All operations](https://skmtc.net/cometapi/apis/create-api-key/llms.txt) · [OpenAPI document](https://skmtc-service-staging.skmtc.workers.dev/v1/apis/cometapi/create-api-key/versions/0863102dbf34/schema)