Using Mac Affinity Designer (version 2.0.3). In the Navigator panel you can correctly enter the zoom percentage as a decimal. For example, "25.3%" correctly zooms one-tenth percent larger than entering "25.2%". However after entering the decimal value, the field rounds it to the nearest whole number. Entering 25.3% is displayed as 25%, entering 25.6% is displayed as 26%. The decimal portion should be displayed instead.