The reason to capture a site over and over is to see what changed. Compare puts two dates on screen at once, locked to the same spot, so the difference is the only thing you have to look for.
Opening it
Click Compare in the tool rail. The viewport splits, and each side carries its own date in its own header.
Choosing the two dates
The left pane shows the date you are already on, with See other dates beside it. The right pane opens on the nearest other capture and carries Change. Either link opens a list of every date that has a capture of this area; pick one and that side moves.
The switcher on the divider
The control that changes how the two dates are drawn is not in the header — it is a small vertical pill sitting on the divider itself, halfway down. Three buttons, always in this order:
| Button | Mode | What you get |
|---|---|---|
| 1 | Dual camera a rectangle split down the middle | Both dates on screen, one per pane, each with its own date header |
| 2 | Single camera a plain rectangle | The same two panes, driven as one |
| 3 | TwinLens™ a rectangle with a magnifier | One full-width view, with the other date inside a lens you drag over it |
The active button is filled blue. Below the pill there is a ‹› handle — that is for dragging the divider itself, not for changing mode.
TwinLens™
TwinLens is the one worth learning. Instead of two panes it gives you one full-width view of the base date, and a floating window you drag around it that shows the same spot on the other date. Line the lens up over a wall and you are looking at that wall on two dates in the same frame, at the same scale.
The lens has a title bar reading TwinLens™ with a grip on the left and an opacity slider on the right, shown as a percentage. At 100% the lens is opaque and you see the other date outright; ease it down and the base date bleeds through, which is how you catch a difference of a few centimetres. The comparison date's own chip sits inside the lens, with Change beside it, so you can swap the date without closing anything.
The three mode buttons move with the lens — they dock to its left edge while TwinLens is active.
Notes while comparing
The Notes panel stays available in Compare, and note pins are drawn on both panes. That is usually the point — you find a difference, then raise a note on it without leaving the comparison. See SpatialNotes — create and manage.
What carries over from 4.0
The three modes are the same three CupixWorks 4.0 had. What changed is that they are now an explicit control rather than something you had to know about, and each pane names its own date.