When you mean to re-use a certain layers combination across several keys, you may want to make a “key template” first using one key, then applying it to other keys.
<aside> 💡 Key templates are the equivalent of copy/pasting a key’s legends.
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First, create your “base template” key legends, then click the “Use as template” button
The new template is created and shows in the bottom left of the modal
Now, after selecting another key (W in our example), click the template created before.
Voila! Save your changes and you’re done. Rinse and repeat.