Editing Unicode (section)

=== Combining characters ===
{{Main|Combining character}}
{{See also|Unicode normalization#Normalization}}

Characters with diacritical marks can generally be represented either as a single precomposed character or as a decomposed sequence of a base letter plus one or more non-spacing marks. For example, ḗ (precomposed e with macron and acute above) and ē&#769; (e followed by the combining macron above and combining acute above) should be rendered identically, both appearing as an [[e]] with a [[Macron (diacritic)|macron]] (◌̄) and [[acute accent]] (◌&#769;), but in practice, their appearance may vary depending upon what rendering engine and fonts are being used to display the characters. Similarly, [[dot (diacritic)|underdots]], as needed in the [[romanization]] of [[Indo-Aryan languages|Indic languages]], will often be placed incorrectly.{{Citation needed|date=July 2011}} Unicode characters that map to precomposed glyphs can be used in many cases, thus avoiding the problem, but where no precomposed character has been encoded, the problem can often be solved by using a specialist Unicode font such as [[Charis SIL]] that uses [[Graphite (SIL)|Graphite]], [[OpenType]] ('gsub'), or [[Apple Advanced Typography|AAT]] technologies for advanced rendering features.