No obvious way to activate the inspector described in the README

[aspiers]

The README doesn't explain how to activate the inspector. I installed the plugin but I couldn't see any difference in my app. I noticed that the config options say there is a default keybinding: 'control-shift' on windows, 'meta-shift' on other os, but I'm on Linux and meta-shift didn't do anything. I also saw

  /**
   * Toggle button visibility
   * @default 'active'
   */
  toggleButtonVisibility?: 'always' | 'active' | 'never'

but it's not clear what active means. I tried changing it to always but I still couldn't see a button.