Overview Tool


The Image overview provides a thumbnail of the image and contains an embedded indicator for the region of the image currently shown on the Viewer. The overview tool also displays an overlaid heatmap of all the regions viewed by the logged-in user at various scale factors.

To maximize the overview tool
  1. Click on the Open Overview button on the bottom right corner of the image
To minimize the overview tool
  1. Click on the Hide button on the top left corner of the overlay tool

Current Region

The current region that is being displayed in the viewport is represented by the green rectangle on the image overview panel. You can also click on the overview to move the viewport to that location.

Heatmap

The heatmap automatically tracks all the regions viewed by the logged-in user. The resolution of the heatmap is limited to the resolution of the thumbnail image used in the overview tool.

The color retained by the heatmap in a given area is the highest magnification viewed at the location. The colors of the map represent the scale at which different regions have been viewed:

  • Blue ≥ 10%
  • Yellow ≥ 20%
  • Purple ≥ 40%
  • Light blue ≥ 60%
  • Green ≥ 80%
  • Red ≥ 98%
To toggle the visibility of the heatmap
  1. Click on the Overview button to the top left of the overview tool
To reset the heatmap
  1. If the left sidebar is not displayed, toggle it by clicking on the Menu > button at the bottom left of the Viewer

  2. Hover or click on the Help button in the left sidebar to open the Help panel

  3. Scroll down to the end of the panel and click on Clear Heatmap

  4. Click on the OK button to confirm selection