When you click the Add Dataset button in the Incoming Dataset section of a derived dataset, or edit an existing Incoming Dataset, you will have a number of options related to how it is used.
Dataset: A list of all datasets available to you appears in the topmost drop down menu. Find the dataset to be used as the basis for this view and select it (it will become checked once selected).
Variables to Keep: In this area, you will select which variables will be brought in from the selected datasets. Select variables from the drop down menu.
Select All: Checking this box will keep all variables from the selected dataset. This will remain the case even if variables in the dataset change over time.
Source Variable Name - This option appears only for the first dataset in the Incoming Dataset list. It allows you to enter a variable name that will be added to the View. The value of this variable will be the name of the incoming dataset for which the record eminated. This allows you to use that information later in your view definition.
Required for Data Refresh: Checking this box will require that the selected dataset is fresh before the underlying view runs, if it is set to execute "upon data refresh". This setting only has an effect if "upon data refresh" has been set for the view.
Filter Tab - For more information about how to use this dialog, please see the following article: https://support.lityxiq.com/806706-Using-the-Filter-Dialog
When you are finished, click Save, or click Cancel to cancel any changes you have made.