QTDragon_HD Pi4 font size

Hi,
Not sure if its QTD or Pi4 issue,
but I have quite a large font when I ran lcnc
have tried display resolutioin, apperance settings with no luck. it changes system menus, but not lcnc
 

probably the style sheet.
press F12 to see the style sheet editor

I saw it, but dont understood what to change there ?
Any points to start from ?

linuxcnc.org/docs/2.9/html/gui/qtdragon.html#_stylesheets

gives a hint. Look for 'font:'
'pt' stands for the size

this is size 25 style lato heavy:
font: 25pt "Lato Heavy";

Check the whole style,
the only huge font (20pt) is
DROLabel,
QLabel#label_axis_x,
QLabel#label_axis_y,
QLabel#label_axis_z,
QLabel#label_axis_a
rest is 10 an below

for 1980x1080 10 should be rathe small (
So I think its more to pi4 itself than qtdragon, but I cant figure that owt

Have found that if I add
export QT_SCALE_FACTOR=1
or QT_SCALE_FACTOR=1 before running lcnc it looks as it should be
have check defaults

Excellent. I have not heard of that setting. Do you have a link with info?