Experience Builder embed URL parameters

[JGardner]

I am trying to get a side panel to open by default on an embedded map. This is the map: the CDC SVI viewer.

As you can see in that URL, several parameters have already been set. Also on that map you will notice a button in the top-left corner, where the legend is hidden.

I want this legend to open automatically when I embed it into Experience Builder, but I can't identify which parameter I need to set.

[JGardner · Accepted solution]

I found my answer in this documentation (could not find it while searching the other day): https://doc.arcgis.com/en/arcgis-online/reference/embed-map-parameters.htm

The URL parameter I wanted was "show_panel" set to true.