# How to Configure BLF on Virtual Multi-Purpose Key
The following steps will allow you to configure BLF and Speed Dial keys on your Grandstream IP phone.
**Requirements:**
* LAN access to your Grandstream IP phone
## Steps
1\. Log Into IP Phone
2\. Navigate to **Settings >** **Programmable Keys >** **Virtual Multi-Purpose Keys**
* The buttons for the phone will appear in numbered order going down the left side then down the right side. It is recommended to leave line 1 as it is used for registration
* On the key you wish to modify, select **Edit VPK**
* Enter the values described below:
* **Mode**: Busy Lamp Field (BLF)
* **Accounts**: Account 1
* **Description**: Label you wish to appear on the screen (i.e. extension number)
* **Value**: Extension number you wish to monitor (i.e. 4371\*011)
* Click **Save**
Continue the process for as many BLF keys as you wish At the end of the list, you may press **Add VPK** to continue adding more.\
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