Using the Read Me and Configuring the Overlay
In-game guidance and configuration
The One Probe ships with an in-game readme guide, provided as its own item. Because the mod's behavior depends on configuration, this readme is the intended reference: it explains the overlay and how the probe reports on blocks and entities.
The overlay itself is configurable. Rather than hardcoding what you see, the mod lets you control the display, so the information shown while looking at a block or entity can be tuned to your preference. The probe helmets, the standalone probe, the bauble probe, and the creative probe all feed into this same overlay system.
If something looks different from what you expect, consult the readme item first. It documents the mod's processes and options directly in-game, which is more reliable than assuming default behavior.