Also see hiragana
When a table cell has a third line, that line takes two forms - no parentheses or with parentheses. When it has no parentheses like "dsa" then it is an explanation of the pronunciation. When it has parentheses then it is how it is entered with an IME. If it is like "(wo)" then "wo" is how it is entered for any IME. If it is like "(dji-di)" then "dji" is how it is entered in the Fluentaro IME, and "di" is how it is entered in standard IMEs. If it is like "(-thi)" then "thi" is how it is entered in standard IMEs while the Fluentaro IME uses the romaji "ti".
ー stretches the vowel before it. For example コーヒー is "koohii" in romaji. This is the same pronunciation that a double vowel would have, like コオヒイ. For keyboard entry, use the regular "-". Fluentaro also uses "q" for ease of use on phones.
ッ (ッ is smaller than ツ) stretches the consonant after it. For example カップ is "kappu" in romaji. For keyboard entry, double the following consonant. Entering "xtu" also works.
For more, see Wikipedia's katakana page.
Voice: