To hide 0r remove borders in Google Sheets and Docs, open the document, select the preferred table, then choose the relevant options to delete the borders.

Google Docs makes it easy use Tables. Learn how to add and edit Tables, insert or delete rows or columns, etc, in Google Docs.

You can add a border in a Google Docs page using a workaround, since there's no built-in border tool for doing this automatically.

Set the Table border to 0 pt to remove the visible borders, making the table invisible and leaving only the image and caption visible.