Daniel is right, it works with spaces in LO, but it takes some fiddling. If you type rtl, as I was doing, the dotted circle doesn’t show up until you type a second vowel. Starting a rtl line with a space fixes that. Also, if you type ltr, the first use of ַ lines up left of center under the circle. The second use is perfect.
So, I tried this in Word (Online, since I use Linux), and it also works with a bit of fiddling.
vowels, dotted circles as consonants.png 20.88KB
Publishers/authors often use InDesign to combine characters, and/or tables to line them up perfectly.
Edited: substituted ַ for the the dotted circle with פַּ֣תַח that didn’t render correctly
Edited by Michel Gilbert, 03 October 2016 - 10:53 AM.