OS : Leap-15.3 with KDE-Plasma
using cb-12776::wx-305 ( this is not specific to this version )
file used : managerplugin.cpp:L54-90 (selected area)
Process :
1- File->Print :
Selected text only : yes
Black & White : yes
All others : no
-> 'Print'
2- Printer dialog
-> Print preview : this calls 'Okular' (viewer of many formats)
Okular->Print->Save as 'managerplugin_50_94_print.pdf'
see the attachment : 'managerplugin_50_94_printing.pdf'
Remarks:
1- this problem has existed for a long time ...
2- to be sure that the problem is not due to the printer or the system => the same file loaded in 'Kate' prints correctly
3- no problem under Win-7, cb12776::wx-315