You can personalize the Graphical User Interface (GUI) to better suit your needs or style.
For example, you can reorganize the menu bar and create, delete, or modify toolbars.
The changes are stored in a configuration file, which is located in your ChemAxon user folder under the version number which the customization was made with.
Make sure that your configuration.xml file is copied under the newly created folder when you update to a newer version of MarvinSketch.
To restore the default settings, simply delete the configuration file, the system will create a new file.
For more information about configuration and the configuration file, see Customizing MarvinSketch GUI - Server Side.