# Basic mapping

The tMap provides a graphical tool called Map Editor that allows you to create the mapping more easily from the input table to the output table using a simple drag-and-drop action. The following screenshot shows a simple mapping without any transformation from the input table to the output table.

![Mapping editor.](https://help.qlik.com/talend/en-US/components/8.0/Resources/images/190513444_basic_mapping.png)

In the screenshot above, you can see the format used to map the input column in the Expression Builder of the corresponding output column is: rowName.columnName, row1.customer\_id in this example. row1 is the row identifier of the input table. It is not a constant, and it may change according to your Job. You can always read it at the top of each input table.