As you may know, initially Magento keeps all configuration values in XML files. XML structure allows dividing all configuration values into separate sections, subsections, etc. In that way, every configuration value has its own path in the configuration three (called XPath). We usually work with Magento built-in configuration files, however, there are some situations when we need to have our own configuration file alongside with the standard files.

You may face with the situation when it is necessary to change a data grid for your OroCRM application. It is quite easy if you have already created your own bundle (we’ve described how to create a bundle in the previous article).
In this case, you can simply add few changes to datagrid.yml of this bundle. Nevertheless, sometimes we have to work with the bundles created by other developers or system bundles. And in those cases, we can use two ways: overwrite a full data grid configuration of the corresponded bundle or work with events of a listener.

Sometimes we can face with the different dependencies between the system bundles or bundles that are already created by other developers, and we will have to change the configuration for such bundles. Usually, it can be easily done because OroCRM has a quite good GUI interface. So, using GUI you will be able to change the configuration for any bundle. Nevertheless, pay attention that if you need the bundle for deployment to different servers, this way is not convenient. In case of deployment, you will need to add a description of the appropriate settings and it is also important to follow these settings in further development. The best way is to use the migrations scripts. In this article, we will show you how to change a config of a single entity in the bundle.