The Workbench in Zenless Zone Zero is where features can be upgraded.
The Workbench includes Partner Files, Intelligence, Hollow Codex, and the Proxy Handbook.
Belle in front of the Workbench
Partner Files logo
Here, you can check your recent interactions with Agents.
"The Proxy business relies heavily on friends and connections." "That being said, we don't offer discounts to friends." Belle reminds.
Intelligence logo
Here you can check all the clue items you have recently collection.
This clue board is reminiscent of those often seen in detective movies. Belle set one up in a corner on a whim, and surprisingly, it proved to be quite useful...
Here you can check your collection Resonium and unlocked special Hollow events.
Information regarding the peculiar items found in Hollows tends to be scarce, and the value of such information often exceeds one's imagination.
Proxy Handbook logo
You can check this for information on different functions.
Apparently, many Proxies will use cryptic codes in their notes to prevent them from being used as evidence in the off-chance Public Security catches them. However, Bell and Wise don't both with it... After all no one can catch the real Phaethon.