Hello

I would like to add a function in word so that when I press the letter 'a' twice, i.e. when I write 'aa' it automatically becomes 'ā' instead. I tried doing this with the Macros function, but I wasn't able to have the keyboard shortcut 'aa', I could only assign special keys like F1 as keyboard shortcut keys. Maybe I used the Macron function incorrectly.

Please tell me how I can make Word automatically write 'ā' when I write 'aa'.