---
version: "2026.1.0"
language: "en"
---
# Green Screen

Leapwork's **Green Screen building blocks** are purpose built blocks for automating **text based terminal applications** (green screen or mainframe style UIs) through a supported terminal emulator.

They let you **connect to an active terminal session** , then **read and write screen content** using cursor position, keys, and table interactions, so you can validate messages, extract values, and navigate workflows even when there are no modern UI controls.

A key benefit is Leapwork's **field recognition** for green screens, which detects the relationship between **protected labels** and the **unprotected input field** that follows, making it faster and more reliable to get or set values in terminal forms.