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# Addons (How to activate Module in invoicera )-New Design

**Apps And Addons** is an important part of a supply chain cycle and helps initiating a commercial communication.
A **purchase order (PO)** is a commercial document generated by a buyer to a vendor (supplier) OR service provider. The document explains the precise details of the types, quantity, and agreed price for the products or services requested by buyer.
You can activate the purchase orders and all the modules of invoicera (Invoice, PI, Estimates, credit Note, Product and Services, Recurring invoices, approval module, project time tracking, Expenses, GST, PDf protection, QuickBooks feature from Invoicera when required.

Here is how you can do this –

Here's a clearer and more professional version of your test steps:

1. Log in to the application using valid credentials.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_1cu01x3.png)

2. Navigate to the **Analytics & Apps** section.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_1ygh1ew.png)
###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_1bgcocf.png)

3. Click on the **Apps** module.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_60nv3j.png)

4. Select any application that is currently **inactive** (for example, **Purchase Orders (PO)**).

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_ytbxb7.png)

5. Click the **Activate** button for the selected application.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_xs87ey.png)

6. A confirmation pop-up will appear on the screen.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_1d2bdwr.png)

7. Click **OK** to confirm the activation.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_1upmy0e.png)

8. Verify that the selected application is successfully activated.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_wmpdug.png)

9. Confirm that an **Active** indicator/check mark is displayed on the corresponding application widget.

###### ![](https://storage.crisp.chat/users/helpdesk/website/-/f/b/d/3/fbd301f55ae1b800/image_1592g0e.png)