You can change the visual appearance of the map markings under the Visualization tab. Click the cog or settings symbol (see arrow in the image above) and a new menu will open, allowing you to change the colors, opacity, line width and circle diameter of map markings.
You can also choose to visualize the data as a heatmap (pictured below). A heatmap shows the data as activity hotspots, i.e. the 'hottest' (red) colour indicates where the responses are concentrated.
The heatmap visualization follows the mechanism of spatial interpolation, where the values of unknown points are estimated on the basis of values of known points. Blurring reduces the visibility of the forms of individual points and increases the merging points. The radius switch determines the reach of individual data points.
Now that you know how to visualize your map data, have a look at how to take a closer look at the different responses and their content. You can also create image files of the map views you have created.