Writing the post
Where: inside the composer, the left column
The editor
Section titled “The editor”Instagram, TikTok and YouTube share one editor: bold, underline, emoji and your signature. None of the three accepts HTML, so what you see is close to what the platform gets; the preview column on the right shows the exact rendering, see The post composer.
Character counts
Section titled “Character counts”The counter under the editor shows the limit for the selected channel, and it is media-aware, so attaching an image can change the number.
| Channel | Limit |
|---|---|
| 2,200 | |
| TikTok | 2,000 — and on a photo post, a separate title capped at 90 |
| YouTube | 5,000 for the description — plus a required title of 2 to 100 characters, and tags capped at 500 characters in total |
If you are over the limit on one channel only, detach that channel rather than cutting the text everywhere. See Global vs per-channel.
The character counter is a small pill; tapping it on a phone explains why a post is being refused.
Mentions
Section titled “Mentions”Type @ and the editor opens a suggestion list meant to be filled by the
platform, on a detached channel only. On Instagram, TikTok and YouTube that
list stays empty: type the handle as plain text, the platform resolves it in
the caption.
Instagram collaborators are a different thing: they are in the post’s settings, not in the text, and they invite an account to co-author the post rather than mentioning it. See Posting rules by platform.
The emoji picker sits in the toolbar and follows your light or dark theme. You can also paste emoji directly. On a phone it docks to the bottom of the screen instead of overflowing.
Signatures
Section titled “Signatures”The signature button inserts a saved block of text. If one of your signatures is marked auto-add, it is already in the editor when the composer opens.
Manage them in Settings, see Sets and signatures.
UseNadia validates links as you type and rejects ftp:, file: and mailto:
schemes, plus anything that looks like a bare email address.
What happens to the links you do add depends on your short link preference. See Links and validation.
The editor keeps 100 steps of undo history. Closing the composer discards everything, so save a draft if you are not finished — see Scheduling and publishing.