While working inside Trimble Connect for Browser’s 2D Viewer, you will be able to add comments to Files, ToDos and Views.
Navigate to the 3D Viewer.
For more information - please see Accessing the 3D Viewer.
Click the Add a comment button located at the bottom of the detail panel.
Type your message.
Click Comment to add the comment.
The comment will be displayed in the panel under the Comments Section.