It is possible to set defaults for a dynamic row configuration, this is done by adding additional XML to the defaults block in the `config.xml` file for the module.

Add a block to the `<default>` section of the `config.xml` file and do not include any values:

<system>

<general>

<ranges></ranges>

</general>

</system>

For each complete line of configuration, create an XML block with a repeating node that has a different value to all the others and contains XML tags for each sub-option and value.

For example, you can use `<item1>, <item2>`.

The sub-options are the columns defined in the `_prepareToRender()` method as described in [Step 2](#step-2-create-the-block-class-to-describe-custom-field-columns).

In the following excerpt, a single row for `item1` contains 4 sub-options:

<item1>

<from_qty>5</from_qty>

<to_qty>6</to_qty>

<price>10.00</price>

<tax>1</tax>

</item1>

Continue building the default block by adding 3 items to the `ranges` configuration option in the `config.xml` file:

<system>

<general>

<ranges>

<item1>

<from_qty>1</from_qty>

<to_qty>5</to_qty>

<price>10.00</price>

<tax>1</tax>

</item1>

<item2>

<from_qty>6</from_qty>

<to_qty>10</to_qty>

<price>20.00</price>

<tax>1</tax>

</item2>

<item3>

<from_qty>11</from_qty>

<to_qty>15</to_qty>

<price>30.00</price>

<tax>0</tax>

</item3>

</ranges>

</general>

</system>

To verify the default values for the configuration are correct, do the following :

- Ensure that this configuration option has no entry in the database.

- Continue with Step 5

The result is a new dynamic system row field in the Admin panel. If you have set optional default values, these should also appear.