Hi Vignesh,
As per my understanding, you want to show the imported table's column name in a pop-up box and are having a hard time with it.
In order to create a pop-up box, you can use the "uifigure" function with 'WindowStyle' set to'modal', and then you can use "uitable" to create a table to display the column name. You can refer to the below two links to learn more about "uifigure" and "uitable," respectively.
- https://in.mathworks.com/help/matlab/ref/uifigure.html#namevaluepairarguments
- https://in.mathworks.com/help/matlab/ref/uitable.html
I hope this will help you to proceed ahead with your workflow.