1. Select "Heatmaps" from the left navigation bar.
2. Click on the icon as shown in the below image of your desired domain.
3. Then Click on the icon shown below of your desired page.
4. You will be directed to the heatmap of that page, here u can select the opacity of the heatmap by scrolling the Blue icon to the right(for higher opacity) or to the left(for lower opacity. You can also select a date range, that data stats will be used to generate heatmap for that time frame As shown in the below image.