Custom Module

How can I create custom modules in 8.2?

You can follow the instruction in the following link to create custom modules if you are familiar with programming:

https://community.Vtiger CRM.com/help/vtigercrm/developers/develop-extensions-for-vtiger.html

OR

You can use this extension to create custom modules and relationship from vtiger settings:

https://www.joobilant.com/vtiger-extensions/vtiger-module-builder-relationship-builder/