At the bottom of the Font window you should see some pop-up menus. Choose "Codepages" from the mode pop-up, and then choose the code page you want from the next menu to the right.


Alternatively, you can choose "Unicode Ranges" from the first pop-up and then choose a range from the other menu.
After choosing one of these display mode/glyph range combinations, the Font window will display the appropriate templates for various ranges of glyphs.