This has all kinds of interesting info.
How to Type Letters with Accents on Mac
I needed to look it up when I found the need to type a word with two dots over the u.
Years from now, (maybe only in a couple of days) I'll wonder what I was typing so I'll mention it here.
I was tracking movies we watched in a spreadsheet since we seemed to be watching a movie or episodes of a series everyday with our Happy Hour and the movie was AClüsterfücke Christmas.