<p>Yes, each time you publish. When the design changes, you publish again from Revit and BidLight stores the new version as its own snapshot. It does not overwrite the old one.</p> <p>Here is what happens next:</p> <ul><li>The new snapshot sits beside the old one, with its own files, author and milestone.</li><li>You compare any two revisions element by element. A wall moves, a fixture swaps, a floor gets added: each shows up as a change, grouped by category.</li><li>Issues stay pinned to their elements, so you see which open items the change affects.</li><li>Owners see their items in the 6am daily digest.</li></ul> <p>No hunting for what changed, no stitching updates together from three tools. You find out in about 15 minutes instead of a 90-minute meeting. BidLight tracks changes between revisions. It does not run automated clash detection, so you decide what each change means.</p>