How can I specify config for a rule at the playground?

[alexeyr-ci]

This is what it looks like for me:

If I select a rule it isn't clear how config changes or how I can specify options. It also seems impossible not to include any config.

Compare with the main ESLint playground:

where I can edit the ["error"] field.

[alexeyr-ci]

Now that I think, I can use the # eslint ... comments, so this answers the question and I'm posting it mostly in case someone else needs it :)