Data Import Wizard pages can slightly differ due to the product you have been using.
Map the Source columns to the Target ones. If you are importing the data into a new table, Data Pump will automatically create and map all the columns. If you are importing into an existing table, only columns with the same names will be mapped, the rest should be mapped manually. (If no columns with the same name are found, they are mapped in succession - the 1st column in Source with the 1st column in Target, etc.) See the Target columns in the top and the Source columns at the bottom of the wizard page. Click Source column fields and select required columns from the drop-down list. (For more information about mapping, go to Mapping, Data Import Wizard topic.)
To cancel mapping of all the columns, click Clear Mappings on the toolbar. To restore it, click Fill Mapping.
You can save the import settings as a template for future uses. Click the Save Template button on any wizard page to save the selected settings. Next time you should only select a template and specify a location of the Source data - all the settings will be already set. For more information, go to Saving and Using Templates topic.