tldr/pages/linux/compose.md

compose

An alias to a run-mailcap's action compose. Originally run-mailcap is used to mime-type/file. More information: https://manned.org/compose.

• Compose action can be used to compose any existing file or new on default mailcap edit tool:

compose {{filename}}

• With run-mailcap:

run-mailcap --action=compose {{filename}}