Duplicate is one of the most common commands in Illustrator, and it’s especially useful for creating copies of objects or elements. To duplicate an object or element in Illustrator, follow these steps:
1. Select the object or element you want to duplicate.
2. Click the Copy button (C) in the Illustrator toolbar. Or press the keyboard shortcut.
3. Go to the destination location where you want to place the duplicate object or element.
4. Select the object or element you just copied, and then click the Paste button (P) in the Illustrator toolbar. Or press the keyboard shortcut.
The duplicate object or element will be placed at the destination location. You can also use the keyboard shortcut for Duplicate, CMD+D (Mac), or CTRL+D (Windows), to quickly duplicate objects or elements in Illustrator.