Expands M365 Copilot Chat to the available page width while retaining modest page margins.
A lightweight userscript that expands Microsoft 365 Copilot Chat across the available browser width while retaining comfortable padding along the page margins.
Microsoft 365 Copilot normally constrains conversations to a relatively narrow reading column, leaving substantial unused space on larger displays. This script removes those restrictive width limits from the chat area and message composer, making long responses, code blocks, tables, and detailed content easier to read.
The page margin is controlled by the following line in the userscript:
padding-inline: clamp(12px, 1.5vw, 24px) !important;