> ## Documentation Index > Fetch the complete documentation index at: https://docs.versori.com/llms.txt > Use this file to discover all available pages before exploring further. # Variables The Variables tool allows you to update the global variables during board execution. Global variables can be used by selectors anywhere in the board. The global variables are defined from the UI and you can view and update the current value of a variable. ### Configuration The Variables tool doesn't have any configuration but it will update the value of a variables based on the input provided. If you have a board where you want to update a global variable you can use a datamapper or a trnasformer before the variables tool to update the value of the variable. ### Viewing Global varaibles Global varaibles are viawable in the UI and you can see the current value of the variable. view ### Example usage Update global varaible from a board exampel