I need to write an acute accent over over a Russian letter to indicate stress. Google tells me to switch to QWERTY, hold the letter key and select the accented one. This types a U+00E9 LATIN SMALL LETTER E WITH ACUTE, but I'm using Cyrillic letters, not Latin letters and what if my letter isn't in the Latin alphabet, like И?
Here is a custom layout I made once which lets you put in the stress marks on Russian text.
The combining acute character needed for this is also available in the ABC Extended keyboard at Option Shift e, or in the Character Viewer at U+0301