Hi Alfredo Glower,
In the Tools menu, choose Properties, and then click the Variables tab, and add variables there. The variable does not have to be a Boolean.
On the Test Data tab, where it says Display Output, you choose whether you are defining the condition for the true or false path. You can create a new variable right in this tab (click Add Variable button), or insert an existing variable that you just defined in the flow's Properties. The condition can be a simple string or number comparison, or you click the second Edit button the define a value in Data Painter.
On the Output Details tab, you can also rename the Output Descriptions (e.g. up/down instead of true/false).
Are you looking for doc mainly on the Data Painter, or the overall process?
--
Ruth Kusterer