Let's see how you can Clone a BOQ/Sub-Location. The first step is to navigate to the Layers portion of the Measure Tool, then look for the Clone BOQ/Sub-Location button on the right hand side - The buttons will be in line with the associated BOQ/Sub-Location.
Now click on the Overlaying Squares Icon associated with the BOQ or Sub-Location you wish to Clone. A popup will appear with editable fields relating to the BOQ/Sub-Location. Go through and update any details you wish to change and once you've finished updating them, click the CLONE BOQ button or SUBMIT button (if you're cloning a Sub-Location).
Pro Tip
Cloning a Sub-Location will clone ALL associated BOQ's at the same time.