The Replace Item feature is a tool within the Estimating tab that allows users to easily swap out an existing line item in their estimate for a new one from the cost catalog. This is useful when you need to change a material or service on an existing estimate.

The system employs a smart filter based on the Unit of Measurement (UoM) of the original item to ensure compatibility and prevent errors in your estimate. It will only display items that share the exact same UoM as the item you are replacing.
However, items in the cost catalog that have a UoM of NONE are considered universal and will always appear as replacement options, regardless of the original item's UoM.