Newbie here: How do I make the "yu" small

I would recommend studying Foreign Katakana combination as well, as it is quite useful. For example,

フェ FE
ジェ JE
ティ THI
クォ QO

I find it hard to Google for a guide on this one.

I asked this once: Wapro romaji JYA (when using IME). Is it wrong to type this way? Does anyone else do it?

One can also type ZYA, but no-one actually do this. People tend to type JA rather than JYA, btw.

Also, I type TI and TYA.

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