Cursor and selection

The cursor is the outlined box; the selection is what is tinted. The two are distinct: you move the cursor around without losing anything that is chosen.

Choose

Key	Effect
`Ctrl+A`	Select all
`Ctrl+Shift+A`	Deselect all
`*`	Invert selection
`+`	Add everything that has the same extension
`Shift+F2`	What the two panels have in common
`Ctrl+Shift+C`	Copy path
`Ctrl+Shift+N`	Copy the name

And the lasso with the mouse, with Ctrl or Shift on click, as everywhere.

Measure

Space measures a folder — its size is written in its column — without selecting it. It is the action you repeat while going down a tree to find out what weighs the most; disk usage does it in one go, and as a picture.

What is hidden

Ctrl+H shows or hides hidden files. The setting is per panel, and is remembered from one session to the next.

Meneaufile manual, in English.