How do I add a Signature field to a module?

You can add the Signature field to different modules on the Module Management page. For you to understand the process, we will add a signature field in the Purchase Orders module. You can follow the same steps to add a signature field to other modules. 
Follow these steps to add the Signature field:

1. Log in to your Vtiger CRM account.
2. Click the User Menu on the top right corner of the screen.
3. Select Settings.
4. Go to the Module Management page.
5. Click Module Layouts & Fields. The Module Layouts & Fields page opens.
6. Select Purchase Orders from the Select Module dropdown to add the signature field.
7. Click + Add Custom Field. The Create Custom Field window opens.
8. Enter or select the following information:
   1. Select Field Type: Select Signature.
   2. Label Name: Add the name for the field.
   3. Help info: Provide your additional instructions or clarification.
      1. For example, Add your sign.
   4. Mandatory Field: If you want to make the Signature Field mandatory, enable the checkbox.
9. Click Save.