小文字「ァィゥェォ」だけの入力

ァ = [X] + A
ィ = [X] + I
ゥ = [X] + U
ェ = [X] + E
ォ = [X] + O
xの代わりにLキーでも小文字にできますがWindowsだけのようです。

大文字小文字が混じったローマ字入力

間に S, H, W, Yをいれて表現

イェ = Y + E

ウァ = W + [H] + A
ウィ = W + [H] + I
ウェ = W + [H] + E
ウォ = W + [H] + O

クァ = Q + [W] + A
クィ = Q + [W] + I
クゥ = Q + [W] + U
クェ = Q + [W] + E
クォ = Q + [W] + O

クャ = Q + [Y] + A
クュ = Q + [Y] + U
クョ = Q + [Y] + O

グァ = G + [W] + A
グィ = G + [W] + I
グゥ = G + [W] + U
グェ = G + [W] + E
グォ = G + [W] + O

スァ = S + [W] + A
スィ = S + [W] + I
スゥ = S + [W] + U
スェ = S + [W] + E
スォ = S + [W] + O

ツァ = T + [S] + A
ツィ = T + [S] + I
ツェ = T + [S] + E
ツォ = T + [S] + O

テャ = T + [H] + A
ティ = T + [H] + I
テュ = T + [H] + U
テェ = T + [H] + E
テョ = T + [H] + O

トァ = T + [W] + A
トィ = T + [W] + I
トゥ = T + [W] + U
トェ = T + [W] + E
トォ = T + [W] + O

ヂャ = D + [Y] + A
ヂィ = D + [Y] + I
ヂュ = D + [Y] + U
ヂェ = D + [Y] + E
ヂョ = D + [Y] + O

デャ = D + [H] + A
ディ = D + [H] + I
デュ = D + [H] + U
デェ = D + [H] + E
デョ = D + [H] + O

ドァ = D + [W] + A
ドィ = D + [W] + I
ドゥ = D + [W] + U
ドェ = D + [W] + E
ドォ = D + [W] + O

フャ = F + [Y] + A
フュ = F + [Y] + U
フョ = F + [Y] + O

ヴァ = V + A
ヴャ = V + [Y] + A
ヴィ = V + [Y] + I
ヴュ = V + [Y] + U
ヴェ = V + [Y] + E
ヴョ = V + [Y] + O