That's what she said ;)
Damma ُ is represented by "u" so Omar would be represented as "3umar". But, its sound is really "3omar". The sound is really so close with the ayn/3 that it doesn't matter whether you say "u" or "o". With ayn/3, it sounds like "o/oh".
What does second sentence mean
Which Arabic keyboard do i use? I'm using Moroccan but it doesn't seem to cover all the characters.
Modern Standard Arabic Keyboard ☺