Please add a way to specify the location of multiple bits of text using container coordinates

I have an application where I need to put one text string (the Y-axis label) in the top left corner and a second text string containing source information in the bottom left corner. Placing text at the left edge of the graph seems to require specifying container X-coordinate 0. Title obviously supports creating one such label in container coordinates, but only appears to support one piece of text. https://plotly.com/python/reference/layout/ add_annotation supports multiple pieces of text, but does not appear to support container coordinates. https://plotly.com/python/text-and-annotations/#positioning-text-annotations-absolutely

Please offer one tool that supports both multiple strings and container coordinates if it is not already possible to do so. If it is possible, please clarify the documentation. If this is a good Plotly codebase contribution 0 for a data scientist, let me know -- I can attempt it.

Thanks!

Start with the linked layout reference and add_annotation positioning documentation, comparing support for multiple text strings and container coordinates. Done means either documenting an existing workflow that meets both requirements or defining and implementing a supported way to combine them, with the behavior verified by the project’s tests.