how to change font size

[menator01]

To see the tkinter fonts you can do

import tkinter as tk
from tkinter import font
root = tk.Tk()
families = font.families()

tk.Label(root, text=f'tkinter has {len(families)} fonts available.', font=('serif', 14, 'bold')).pack(side='top')

scrollbar = tk.Scrollbar(root)
scrollbar.pack(side='right', fill='y')

text = tk.Text(root, width=75, yscrollcommand=scrollbar.set)
for font_name in families:
    text.insert(tk.END, f'{font_name}\n')
scrollbar.config(command=text.yview)
text.pack(side='top', fill='x')

root.mainloop()