I think a great feature would be to have a customizable/configurable Header Toggle in Lovelace cards. Have the option of using the default actions (turning everything in the card on/off) or using a customizable action (turning on/off a switch that’s not an entity in the card). I have a coffee pot Lovelace card where having the coffee pot switch would way better where the header toggle is instead of having it as an entity in the card itself.
I agree, it would be a nice feature to have.
I have 1 card for my shutters (covers) and having the header toggle to open/close all of them at once would be the most elegant way to proceed.
Adding a button in header or footer is taking a bit more space.
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