Define variables to store static values or calculations. Any change to the variable is applied everywhere in an app where the variable is used.
Click 
Variables in the assets panel to open the variables dialog. You have to be in edit mode.
You can also define variables in the data load script using Data load editor. Set the value of a variable using Let or Set statements in the data load script. Variables added in the load script will be marked with 
beside the name in the variables dialog.
You can search the variables by name or tags by clicking 
.
Variables dialog
See: