After setting the source file type and the source file directory as well as the schema type Companies some options will appear in the navigation bar on the left:
3. Conditions
5. Parent Record Identification
7. Misc Options
8. Translation
To get to the setting Easy Mappings you either click on the right arrow in the lower bar or on Easy Mappings in the navigation bar.

You can switch between the options by using the arrow buttons or by clicking on the particular option in the navigation bar.
The settings Easy Mappings, Virtual Columns, Conditions, Conditional Mapping, Merge Options and Translation are similar to the ones for the contact import.
In the Misc Options chapter there is a small difference:

Here you can add that the contacts belonging to the company will be updated with the new company information.
The setting Parent Record Identification is new.