What is the purpose of the "TRIM" command in AutoCAD?

The "TRIM" command in AutoCAD is specifically designed to allow users to cut objects so that they align with the edges of other objects. When you use the TRIM command, you select the objects you want to trim and then define the cutting edges, which will dictate where the trimming occurs. This functionality is essential for creating clean and precise drawings by eliminating overlapping lines or extraneous sections of objects that are not needed, ensuring a tidy and professional design.

In context, the other options do not accurately describe the purpose of the TRIM command. Extending lines is achieved using different commands, modifying object colors involves adjustment settings in the properties palette, and grouping multiple objects together is done using a separate command altogether. Understanding the TRIM command is vital for efficient design work in AutoCAD, as it greatly enhances the ability to work with precision and clarity.