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Slack: compact message density

Reduces the spacing between messages so more of the conversation fits on screen without scrolling.

Code to copy

/* Tighten the spacing between messages for a denser feed */
.c-message_kit__gutter {
  padding-top: 2px !important;
  padding-bottom: 2px !important;
}
.c-message_kit__background {
  margin-top: 0 !important;
}
.c-message_kit__hover,
.c-virtual_list__item {
  padding-top: 1px !important;
  padding-bottom: 1px !important;
}

How to use this example

1. Copy the code with the button above.
2. Install JustZix (2 minutes) and open the extension on the target page.
3. Add a new rule matching that page.
4. Paste the code into the rule's CSS panel and save — the effect appears instantly.