how to have virtual keyboard with arrows and big font

On my laptop with KDE I started to use a big screen and I need to use virtual keyboard.
the first I tried was qtvkbd, for big fonts is ok but it has no arrows to move cursor.
the second was qvkbd but I cannot enlage and has no arrows.
the third is xvkbd tha has arrows but I din’t succeed to have big fonts on the buttons.
do you know how can I have a virtual keyboard with arrows and big fonts on the buttons?
manythanks, ciao :slight_smile: