The baseline
The four weeks before you changed it
Searchscope captures it when you mark the change applied, and it stays fixed after that, so nothing quietly moves what you’re measuring against. Change the applied date and the baseline is recalculated, which the dialog says while you’re doing it.
Before and after
Clicks, impressions and position
Three cards per page, each showing the last 28 days, the change against the baseline, and what the baseline was. A page changed more than once keeps one card with a timeline on it, and the comparison stays against the first change.
Track changes Searchscope didn’t suggest
Add the page yourself
Marking a finding applied tracks the URL in the finding, which isn’t always the URL you changed. Fixed a cannibalization clash by rewriting the other page? Add that one by hand: the URL, what you changed, and the date.
It fills as you work
Nothing to set up
Nothing appears until you mark something applied or add a page yourself, so an empty tab on a new account is the expected state rather than a fault.