You mean like the one below?
Formatting of bigger letters or bold, italic etc. is called markdown and is very easy to use markup language.
nostr:nevent1qqsw6zk3hfqeemp8ulcts0efvnrupltuy2jx9hwrmkmvxku4qpawm3sppemhxue69uhkummn9ekx7mp0qgspsjp3x4faxllye0vt45kkh33rwc2aw072ge8dktglgd2eqr85fasrqsqqqqqp39q3tx