Just played around with it a bit.
Yes one would expect that the "default" pref defines the default setting in all tabs, but that pref seems not to work anymore at all.
What does still work nicely, are the old line-styling gimmicks!
Form (wavy, dotted, dashed), color, thickness
So if the goal is mainly to get rid of the red waves, just set the thickness to zero (e.g. by macro menu). This seems to work across all tabs. Or use an unobtrusive gray thin dotted line...
old macro from 2011:
http://kmeleonbrowser.org/forum/read.php?9,113831
(if I recall correctly, it was mainly a pref-toggle macro, not interfering with spelling itself)
Edited 1 time(s). Last edit at 12/06/2018 11:18PM by siria.