Sigma offers several ways to find a field’s source. For example, if you are looking at a visualization element, in the top right corner of that element click on the three dots and select Element Source then Go to Source Element. A second way in edit mode is to look at the title of the data source listed under the column list on the far left side of the page. Lastly, you can use the data lineage tab (bottom left of your screen) to see how all of your elements are connected.