# Create or connect to schema

### Create a schema

To use the cell editing or commenting feature, you have to create a schema. If you already have created a schema before, you can connect to an existing schema. 

1. Enter a schema name
2. Select the primary key column
3. Select a connection
4. Hit 'Create Schema' button

{% hint style="info" %}
The connections only shows the connections you are entitled to see. This is configured on a group level in WriteBackExtreme
{% endhint %}

{% hint style="warning" %}
The primary key should be unique. If it is not unique it will assign the value to all rows that have the same key. This might result in unexpected behavior!

Example: Create a unique key by creating a calculated field with for example:

\[ORDER ID] + "|" + \[PRODUCT NAME] 
{% endhint %}

<figure><img src="/files/WVHgUEo3cKOqEbsyzZop" alt=""><figcaption></figcaption></figure>

### Connect to an existing schema

Select your desired schema in the dropdown and click 'Connect Schema'

<figure><img src="/files/sZGHuE1dAtXqLgqZuAEv" alt=""><figcaption></figcaption></figure>

### Switch schema

If you have selected the wrong schema or you want to update your dashboard, you can click the switch schema button.

{% hint style="warning" %}
If you click the 'switch schema' button, it will reset all settings that are stored in the dashboard for that schema. This means you need to reconfigure again after selecting the schema.&#x20;
{% endhint %}

Now you are ready to start configuring cell editing or commenting.

<table data-card-size="large" data-view="cards"><thead><tr><th></th><th></th><th data-hidden></th><th data-hidden data-card-target data-type="content-ref"></th></tr></thead><tbody><tr><td><strong>Cell Editing</strong></td><td>Change data of your SuperTables</td><td></td><td><a href="/pages/s85FIz5NyIqcybZPLdVz">/pages/s85FIz5NyIqcybZPLdVz</a></td></tr><tr><td><strong>Commenting</strong></td><td>Add comments to a cell</td><td>Commenting</td><td><a href="/pages/RXmCG72oJZox2bl4FpYo">/pages/RXmCG72oJZox2bl4FpYo</a></td></tr></tbody></table>


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