"Y-axis starts at zero" choice doesn't remember if leave the section. This showed up a couple of years ago, but it's back in 8.3.0. @jacobs summarized the issue then:
"The issue is with the new “Y-axis starts at zero” checkbox on the Bills & Income > Projected Balances page. The box defaults to being checked. When a user unchecks it, that setting only remains in place as long as the user remains on that screen. Changing to another screen, such as an account register, and returning to the Projected Balances screen, the checkbox is once again checked. Similarly, unchecking the box, quitting Quicken, and relaunching, the box is re-checked. The expectation is that the state of that checkbox will be persistent throughout and across sessions."
