You will get to Preview Screen when you create a new connection, for example as shown here Connect To hadoop or clicking on already created datasources from connect screen.
There are two ways in which data wrangling operations are presented to the end users-
Auto Suggestions -
Ideata Analytics provides a auto suggestive interface to clean your data through left hand side panel in preview screen, in "Suggestions" tab
If you select a particular value in data column, system will auto suggest you several operation which can be applied on the selected column.
You can double click the given suggestions which you like in order to apply it to the whole data.
Column Drop Down -
When you click on the down arrow of a particular column , it will open a drop down list of transformation and wrangling operations. You can choose and click on any of them which you want to apply on that particular column.
It will open a pop up box in which you have to provide the relevant details in order to apply operations on data.
