P

IN[1]

import tkinter as tk
from tkinter import ttk

try :
    from ctypes import windll
    windll.shcore.SetProcessDpiAwareness(1)
except :
    pass

root = tk.Tk()
style = ttk.Style(root)

label = ttk.Label(text = 'Welcome')
label.pack()

style.configure("TLabel", font = ("Segoe UI", 20))
root.mainloop()

OUT[1]

P