Hello @minhsaco99,

To Post an Image :

1. Download it
2. Drag and drop it into the discussion text that you are writing.

How to insert an image in canvas discussion?

How Do I Embed an Image in a Canvas Discussion?

1. On the menu find the Images icon, and select Upload Image.
2. You can drag and drop the image from your computer into the Upload Image box, or click to browse and select the file.
3. Click Submit to embed the image and post the reply when you're ready.