Originally Posted by Doitsu
Unfortunately, I cannot help you with that, because my old K3 doesn't have the Index feature, but AFAIK, it's not possible to display both the Kanji and the Furigana in the index unless you add "頭 【あたま】" as a dummy headword or a dummy inflection, and you'd probably end up with both "頭" and "頭 【あたま】" in the Index list.
I'm attaching some screenshots from the Kindle's free Japanese/Japanese dictionary. I did an index search for 頭 and it only shows one index entry for 頭【あたま】.
I can't figure out how they did it. I decompiled the dictionary and I can see that they use <idx:orth value=""> but I can't tell what the value is ... it looks like a pointer into the index file. I even opened up an index file in a hex editor, but it's unreadable.
<b>あたま</b>【頭】<br/> <b>１</b> 動物の体の上 ...
Attached are screenshots of the index entry and the dictionary entry for 頭.