Under Data settings, you can view all series configurations and select the series that you want to include in Writeback. This is where you control what data gets written back to the destination.
This section lists all series that are available for writeback. By default, all series are selected. You can clear the series that you do not want to write back data to the destination.

You can include your HTML content within the Text data input column as well as in DAX measures, which can be written back.

You can enter and render HTML directly within a text input column.
The HTML content is rendered and displayed within the visual.
When performing a writeback, you can control whether the HTML content is saved as plain text or with HTML tags.
You can embed HTML directly in a DAX measure.
When exporting data:
If the Writeback as HTML option is enabled, HTML content in both:
is preserved and rendered correctly in outputs such as PDF exports.