Show all series in TimeSeries by default

Hi all,

I’m running Grafana 9.0.7. When my dashboard loads the series in my Time Series panel are all disabled as shown in the provided screenshot (greyed out in legend).

I think maybe this started happening because the dashboard was saved with a certain series enabled and the other disabled.

Can anyone please advice me on how to enable all by default and as a bonus explain a little around how this works so I can understand how it happened?