PySimpleGUI元素随窗口自动调整大小

以下代码只能使按钮随窗口大小变化而上边的字(save)并不会改变大小，请问有什么方法使他们同时调整吗？
import PySimpleGUI as sg

layout = [[sg.Button('Save',expand_x=True),sg.In()]]
window = sg.Window('Window Title',
layout,
default_element_size=(12, 1),
resizable=True,finalize=True) # this is the chang

while True:
event, values = window.read()
if event == 'Save':
print('clicked save')

if event == sg.WIN_CLOSED:
    print("I am done")
    break