It seems that I can't type from the category "Combining Diacritical Marks" even though this App said "Unlocking All Categories" and I trusted that.The category "Phonetic Alphabet" let me type some of the combining diacritical marks, indeed, but this is not what I expected. And I also want to type from some other categories such as "Greek extended". Please improve it.P. S.Thank you for "Braille Patterns". That's a great part of this App.To the answer:Of course I know how to use combining characters. I mean it would be great if I could choose all of the categories in Unicode such as "Combining Diacritical Marks", "Greek Extended" etc. on the keyboard.
Thanks for the update. The curated categories of symbols are available in the keyboard, but you can also add characters from the full Unicode table to your favorites to get them to appear in the custom keyboard. Hope that helps so you can type combining symbols quicker!