Resize All of Finder's Columns at Once With a Keyboard Shortcut

There’s a quick way to resize finder columns in unison, and quickly expand or minimize the view.

Just press and holdShift+Optionthen click a column and drag.

When you drag to the right, the columns will expand.

When you drag to the left, they’ll shrink.

Easy Mac Hacks: Finder Column View Customizing Tips| Mac|Life