Click on the 'font' tab.
Select 'Cyrillic(Mac)' from the pull-down menu near "For the encoding:".
From the pull-down menu near "Use the Proportional Font:", select 'ER Bukinist Macintosh'. For the "Use the Fixed Font:", select 'ER Kurier Macintosh' from the pull-down menu. Then click on the 'Apply' button.
Now select 'Cyrillic(KOI8-R)' from the pull-down menu near "For the encoding:".
Then select 'ER Bukinist KOI8' and 'ER Kurier KOI8' from the pull-down menu near "Use the Proportional Font:" and "Use the Fixed Font:", respectively, before clicking on the 'Apply' button.
Click on the 'OK' button and go on to the next step.