Created attachment 171270 [details] Small font size Since KCalc started to provide the possibility to directly edit math expression, that editing zone became the place where user types and modifies complex inputs. So it's wise to increase its font size to make it easier for fast editing. For now, it's possible to only change font sizes of result, buttons and history but not for that zone.
*** This bug has been marked as a duplicate of bug 489151 ***