[Tkinter] canvas size

[menator01]

Maybe this will help

import tkinter as tk

root = tk.Tk()
canvas = tk.Canvas(root, bg='green', width=1200, height=950)
canvas.pack(fill='both', expand = True, padx=10, pady=10)
mytext = canvas.create_text(0, 0, fill='lime', tags=['event'])

def show(event):
    canvas.itemconfigure('event', text=f'Width -> {event.width} Height -> {event.height}')
    xpos = (event.width/2)
    ypos = (event.height/2)
    canvas.coords(mytext, xpos, ypos)
    if event.width > 1210:
        canvas.itemconfigure('event', font=('helvetica 60 bold'))
    else:
        canvas.itemconfigure('event', font=('helvetica 30 normal'))
canvas.bind('<Configure>', show)
root.mainloop()