[Tkinter] Treeview expand button size

[shamnadinn]

Dear Friends,

I am new to Python, I have developed an kiosk application whith python in Ubuntu, which I am using treeview to select the folders and files. The challenge I am facing is the expand button of the treeview is small, can we make it bigger since we are using the application in a KIOSK with touch screen, it is too harder to expand.

Any help would be appreciated.