How do I stop my computer screen from shrinking?

If that does not help, try to change the scaling as suggested below:

1. Right-Click on the Desktop and select Display settings.
2. Scroll down and select “Advanced display settings”.
3. Now, choose “Advanced sizing of text and other items”.
4. Then set a custom scaling level – drag it to 100%.
5. Apply the settings and check.

How do I get Windows 10 to remember my size and position?

1] Use Shift key while closing a window

In general, users click on the close button to close a window. However, you need to click on that same button when holding the Shift key on your keyboard. This trick helps Windows OS to remember the window position.