How do I test an individual rule

In Hazel 4, you used to be able - from within a rule - to select a file to see if its conditions match. How do I do a similar thing in v5? I can't see the icon that activates it.
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PhilM wrote:In Hazel 4, you used to be able - from within a rule - to select a file to see if its conditions match. How do I do a similar thing in v5? I can't see the icon that activates it.