iTOL annotation editor is an add-on for Google Sheets, providing a direct link to your iTOL account. Simply access your trees directly from Google Sheets, create new datasets, edit existing ones, define color ranges or update tree labels. Simplify your annotation workflow by creating datasets and loading tree IDs directly from iTOL. Use the full power of Google Sheets to create the annotations, and then save them automatically into iTOL, without the need for separate files or templates. Descriptions of various fields give helpful hints directly in the Sheets interface. Values for pre-defined field types can be selected directly through pop-down value lists. iTOL annotation editor includes an error navigator, which simplifies the identification and correction of any problems in your data. All error cells are automatically highlighted and show the details on the detected error when selected.