windows manager

I'd like to have possibility to choose window size that is suitable for Apple Stage Manager: have space on the left to have visibility for others windows (something between 1/3 and full window).

The options for Windows Manager to resize Windows in any Office 365 apps doesn't work. They are ghosted. Here is what I see in Word and Excel. They work as expected with other apps like Edge. I'm running Sonoma 14.4.1 (23E224) on a 2021 Mac Pro M1 Pro with 32GB RAM.

The most important tool from the (wonderful!) toolbox for me is the window management currently (yepp, this changes from time to time ;-)). I would love to have a predefined two third size for my windows, both vertically (for my landscape screen) and horizontally (for the portrait one). That...