In an Idea Workspace, + and − now step through set zooms: 10%, 15%, 20%, 25%, 33%, 50%, 67%, 80%, 100%, 125%, 150% and 200%. They used to change the zoom by a quarter each press, which could jump straight past 100% (from 82% to 102%, say) and left uneven figures such as 51%. The + and − keys step the same way. Pinching, and Ctrl with a scroll wheel, still zoom smoothly.
Idea Workspace zoom buttons stop at 100%
The + and − zoom buttons step through round figures and always stop at 100% on the way.