Symptom

When you're debugging configuration, you may enable the Show Property Rules feature of the Rules Inspector.

Thereafter, a red P appears next to property values that make up the current display. You can click the P link to open the corresponding property rule.

However, a P character also appears next to properties in drop-down lists. However, nothing happens when you click the P letter in such lists. .

Explanation

The P characters in drop-down lists are not links.

This is a limitation of HTML and its display capabilities.