recently I tried to edit a Arabic font on the Glyphs but when I writing something with the “T” tool on that
the Arabic letters comes separately، Instead of connected,
I tried solve the issue to to used "Align right " to writing and I used Arabic keyboard as well but the issue hasn’t fixed!!
I was wondering how can I solve the issue
thank you very much
Telling from the screenshot you posted: It may have to do with the fact that you opened an existing TTF, rather than a .glyphs file. You need to make sure that the positional variants adhere to the naming convention (.fina, .init and .medi name suffixes), otherwise Glyphs cannot guess the replacements for you.
I received your file, and it is as I suspected: The font is using custom naming, therefore Glyphs cannot automatically guess the positional alternates. Please follow the advice in the tutorial I posted above.
Disable custom naming in Font Info > Other Settings.
Select all glyphs and update their glyph info (in the Glyph menu).
Delete and update all features in Font Info > Features.