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Where: Inside the composer, the tabs above the editor This is the single most useful thing to understand about the composer, and the one people most often miss.

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The default: write once

When the composer opens you are on the Global tab. Whatever you write there goes to every selected channel. One post, five platforms, one piece of text. For most posts this is all you need.

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Detaching one channel

Sometimes one platform needs different words: a hashtag block that suits Instagram but not LinkedIn, a shorter version for X, a formal version for a company page. Switch to that channel’s own tab. It starts locked, showing the global content, with a prompt to:
Click this button to exit global editing and customize the post for this channel
Click Edit content and that channel detaches. From then on:
  • Editing the global text no longer changes this channel.
  • Editing this channel no longer changes anything else.
  • The channel tab shows it is in per-channel mode, with a control to go back.
Going back to global asks for confirmation, because the customised version is discarded.

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What only works per-channel

@mentions are the notable one. They are only available on a detached channel, because a handle only means something on one platform. Typing @ in the Global tab does nothing.

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When to detach and when not to

  • The same announcement everywhere
  • Content where platform differences are handled by settings rather than text, for example a YouTube title or a Reddit flair
  • Anything you will edit again later, since global edits stay in one place

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Sets are the shortcut

If you always detach the same channels in the same way, save the arrangement as a set and load it when you start the next post.

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A caveat when building sets

While you are creating a set rather than a post, per-channel editing is disabled:
You can’t edit networks when creating a set
Sets store the channel selection and settings, not detached per-channel copy.