Similar to master variables, globals can be created and managed using the “Master Globals” feature. 

Globals only track a single value; each time it is updated, it overwrites the previous value and retains only the last value. Once a master global is defined, it is automatically added to the definition just as a master variable. 

Take a look at the simple master global UI, designed to make defining globals easier and more manageable. 

You can add "variables and globals" by providing their names and selecting a data type. You can remove variables and globals by choosing them from the list. The variables and globals have default values based on their data type. The Process Instances page allows you to add and delete variables and globals.

• Variables and globals have '0' for the 'Number' data type
• Variables and globals have ' ' for the 'String' data type
• Variables and globals have 'Current date and time' for the 'Date' data type
• Variables and globals  have 'false' for the 'Boolean' data type

In this example below, a list of master globals is defined to be included in each new process definition created henceforth.  

Let's create a new process definition in the example below. 

The process definition is created and displayed on the designer canvas. 

Select the Actions - Define Globals menu to view the “global variables” included in this definition.