The Add Variable button can be clicked to add new variables to a selected screen, component, or behavior. Variables added to screens and components are referred to as custom variables. Custom variables differ from variables which come from standard elements in the following ways:
Custom variables are defined at the screen or component level and cannot be added to standard elements
Custom variables can be renamed
Custom variables can be deleted
Custom variables do not have automatic built-in functionality, although they can be used in Variable References
To add a variable, select a screen or component and click the Add Variables button.
Select the variable type and enter the variable's name in the popup window.
Newly added variables appear in the Variables tab.
Custom variables can be edited just like any other variable but they do not have any built-in behavior such as modifying the appearance of objects in the Editor tab.
Custom variables can be removed by right-clicking on the variable and selecting the Delete Variable item.
Existing custom variables can be edited by right-clicking on the variable and selecting the Edit Variable item.
Custom variable names and types can be changed.