> ## Documentation Index > Fetch the complete documentation index at: https://docs.nushir.com/llms.txt > Use this file to discover all available pages before exploring further. # Writing the post > The editor, formatting, mentions and character counts. The editor is a rich-text field, but what survives to each platform is decided by that platform — most accept plain text plus line breaks and little else. ## Formatting Bold, italic and lists render on platforms that support them and are stripped on those that do not. Nushir sanitises rather than rejects: unsupported markup is removed at publish, so what you see in the editor is the richest version, not a guarantee. Line breaks are preserved everywhere. They are the one piece of formatting you can rely on across every channel. ## Character counts Every selected channel shows its own remaining count, because limits differ per platform — and per instance, on Mastodon. When several channels share the global draft, the *lowest* limit is the one that blocks scheduling. ## Mentions and hashtags Typed as text. A platform that resolves `@handle` or `#tag` does so on its own side — Nushir does not verify a mention exists before publishing. ## Emoji The emoji picker inserts standard Unicode, which every platform renders in its own style. Writing per-platform variants of the same message? Detach only the channels that need it and keep the rest on the shared draft — see [global vs per-channel](/general/composer/global-vs-per-channel). This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.