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Compact left navigation

Reduces spacing and font size in the GA4 left menu so more navigation entries fit without scrolling.

Code to copy

nav [role="treeitem"], nav a[role="link"], nav li {
  min-height: 0 !important;
  padding-top: 4px !important; padding-bottom: 4px !important;
  font-size: 13px !important; line-height: 1.3 !important;
}
nav [role="treeitem"] [class*="icon"], nav .material-icons {
  transform: scale(0.85) !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.