How to specify where a Tkinter window should open?

Tkinter allows you to control where a window appears on screen using the geometry() method. The geometry method accepts a string format: "widthxheight+x_offset+y_offset" to set both size and position.

Syntax

window.geometry("widthxheight+x_offset+y_offset")

Where:

• width, height − Window dimensions in pixels
• x_offset, y_offset − Position from top-left corner of screen

Example

Here's how to create a window that opens at position (300, 300) ?

# Import the required libraries
from tkinter import *

# Create an instance of Tkinter Frame
win = Tk()

# Set the geometry
win.geometry("700x350+300+300")

# Create a Label
Label(win, text="This Window Opens at (300,300)", font=('Helvetica', 15, 'bold')).pack(pady=30)
win.mainloop()

Centering a Window

You can center a window on the screen by calculating screen dimensions ?

from tkinter import *

win = Tk()

# Get screen dimensions
screen_width = win.winfo_screenwidth()
screen_height = win.winfo_screenheight()

# Calculate center position
window_width = 600
window_height = 400
x = (screen_width // 2) - (window_width // 2)
y = (screen_height // 2) - (window_height // 2)

# Set geometry to center the window
win.geometry(f"{window_width}x{window_height}+{x}+{y}")

Label(win, text="Centered Window", font=('Helvetica', 15, 'bold')).pack(pady=30)
win.mainloop()

Different Position Examples

Conclusion

Use geometry("widthxheight+x+y") to specify window size and position. Calculate screen dimensions with winfo_screenwidth() and winfo_screenheight() for dynamic positioning.