The Data tab of the Code Toolbox displays data pipelines and fields, allowing you to drag and drop field references into the Code Editor.
Selecting a pipeline from the list will display all the fields in that pipeline as well as data type and size information for the fields.
To insert a field value into the code editing window, select the field and drag it into the Code Editor. The code necessary to retrieve the field value from the pipeline will be generated. For example, dragging the 'City' field from the Code Toolbox pictured above would result in this code: