Copying a product in the Magento admin can increase productivity by removing the need to manually enter every detail for new products. It also reduces typos because you need only proofread the item you are copying. Once a product is copied, it can be edited. This method is great if you have several products with similar attributes, like manufacturer, color or weight.
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Log in to your Magento Admin Panel, navigate to "Catalog" and select "Manage Products." Click the item you would like to copy.
Click "Duplicate" in the upper right-hand corner. You should see the text "The product has been duplicated."
Click the "Back" button next to the reset button. (Do not click the back button in the browser.) You will now see the same product with a new ID.