For the Ranking Matrix and Ranking Scale questions how these are setup is exactly the same. The difference in these questions types is how the answers can be selected by the user:
The Matrix question is answered one selected answer per column.
The Scale question is answered with one selected answer per row.
For these questions you can add rows and answers in a list to define how the answer grid should be displayed:
Five answers can be added at once for the question, further answers can then be added once the question is saved for further answers on the same rows, or further answers on new rows.
An example of both of these question types, as shown in a survey, can be seen here: