...

Select Pie chart from ‘Available plots’ on the left side and drag it to Add new plot in middle panel. Then select any data node to create a new empty Pie chart Upon dropping the histogram on the canvas, a dialogue opens up with the different data nodes that can be displayed on the histogram. Select your data node of interest (Figure 2). 

Image Removed

Categorical attributes that can be used for the Pie chart would display after any data node from the Data card on the left side of the Data Viewer has been clicked. 

...