# Single DocTypes

A application will usually have a Settings page. In our application, we can define a page where we can set the loan period. We also need to save this property. In Frappe, this can be done using a **Single** type DocType. A Single DocType is like the Singleton pattern in Java. It is an object with only one instance. Let us call this as **Library Managment Settings**.

To create an new Single DocType, mark the **Is Single** property as checked.

<img class="screenshot" alt="Single Doctypes" src="{{docs_base_url}}/assets/img/tab_single.png">

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