Change Tree View Font Size in Atom

If you’re wondering how to change Atom side bar (tree view) font size then you just need to add this stuff on styles.less file in ~/.atom/.

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@font-size: 10px;
.tree-view, .tab-bar .tab
{
  font-size: @font-size;
}

Check it out with font-size 10 (side bar) and editor font-size 9.

Now each window can fit on my 15” rMBP. Perfect!

Cheers and happy coding.