Go to https://lucid.app/ and log in to your account.

Select the diagram you want to add comments to.

Click the "Comment" button in the top right corner of the page.

Enter your comment in the text field that appears.

Click the "Post" button to add the comment.

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If you are creating a diagram in Lucidchart, you may want to add comments to explain certain elements of the diagram or to provide additional information. Adding comments can help to make your diagram more organized and easier to understand for other viewers. Additionally, comments can be used to collaborate with other users on the same diagram.

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