How do put the spanish accent on the i on a keyboard?

It depends on what keyboard you are using (different countries have different keyboards - especially when they speak different languages).

If you are using a US keyboard, there is no option to type í naturally. In Microsoft products (such as Word, etc.) there is a convention on PCs to use Ctrl + ' , followed by the letter over which you want the accent to form. On Apples, the convention is Apple + e, followed by the letter over which you want the accent to form.

If you are using a Spanish keyboard, press the acute accent key and then press the letter over which you want the accent to form.