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
- Click on the Overview button on the bottom right corner of the image
To minimize the overview tool
- Click on the 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
- Click on the button to the top left of the overview tool
To reset the heatmap
If the left sidebar is not displayed, toggle it by clicking on the Menu > button at the bottom left of the Viewer
Hover or click on the button in the left sidebar to open the Help panel
Scroll down to the end of the panel and click on Clear Heatmap
Click on the OK button to confirm selection