# Manual input rows (Writeback Matrix)

Inforiver Writeback Matrix provides a wide array of options to insert, configure, manage row categories, and manually enter data at the visual level. You can insert a single row, a row hierarchy level, or even bulk insert row categories with nested hierarchy levels. 

[Learn how to insert a single data input row](https://docs.inforiver.com/working-with-inforiver/4.-adding-business-logic-and-formulae/insert-manual-input-rows/insert-manual-input-rows/insert-manual-input-rows)

[Learn how to bulk insert rows and hierarchies](https://docs.inforiver.com/working-with-inforiver/4.-adding-business-logic-and-formulae/insert-manual-input-rows/insert-manual-input-rows/insert-manual-input-rows-1)

[Learn how to insert a single hierarchy level](https://docs.inforiver.com/working-with-inforiver/4.-adding-business-logic-and-formulae/insert-manual-input-rows/insert-manual-input-rows/insert-manual-input-rows-2)

[Learn how to merge rows](https://docs.inforiver.com/working-with-inforiver/4.-adding-business-logic-and-formulae/insert-manual-input-rows/insert-manual-input-rows/insert-manual-input-rows-3)