Tracker 'enlarge pattern' not showing

In Davinci Resolve 16.2.3.015, in fusion page, adding a Tracker tool with background input connected, when I click the upper left corner and drag I expect to see an enlarged version of the crosshair area to help with positioning. It doesn't appear. I have confirmed in the Inspector, on the Display Options tab, that "Enlarge pattern on Dragging" is checked, and I have tried adjusting the Enlargement Scale up and down with no effect.

Suggestions please?

The upper left corner is only for resizing the search and pattern area. Dragging the center cross-hair will activate the enlarge pattern pop-up.

My apologies - I'm missing something. When I click to drag the center cross hair, nothing happens to the tracker - a selection rectangle starts. The upper-left corner has the "dot" that is draggable for the Fusion Tracker (not planar tracker).

I'm also looking at the "Fusion Visual Effects with Davinci Resolve 16" pdf page 117 (132/178) which in step 5 says "In viewer 1, drag the handle in the upper-left corner of the pattern box to position the tracker over the upper-left corner of the doorway." "The pattern box expands and displays a magnified view..."

Still puzzled.

The upper left corner is only for resizing the search and pattern area. Dragging the center cross-hair will activate the enlarge pattern pop-up.

It doesn't seem to work that way in Resolve Fusion. In the images below, I first hovered my mouse pointer over the upper left corner of the pattern area, in the second image I left-clicked and held on the upper left corner and it showed the enlarged pattern. Clicking on the center cross-hairs does nothing.

I'm presuming that some setting/toggle in my configuration or Fusion screen has turned this magnifier feature off, but I don't know what it is. As I noted, I did confirm the Enlarge pattern... box in the Inspector for the tracker is checked.