- The changeValueButtonPushed callback of changeValue button is triggered on button push
- It updates the value in the drop-down by accessing each drop-down menu
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1473336/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1473341/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1473346/image.png)
![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/1473351/image.png)
- https://www.mathworks.com/help/matlab/creating_guis/write-callbacks-for-gui-in-app-designer.html
- https://www.mathworks.com/help/matlab/matlab_env/save-load-and-delete-workspace-variables.html
- https://www.mathworks.com/help/matlab/ref/assignin.html