Ctrl + K opens the command palette. Type a few letters and press Enter to run a command; each row shows its keyboard shortcut. A leading $ lists favorites, % the directories on %PATH%, and ! runs a program.

F3 views a text file and F4 edits it, in a built-in editor with syntax coloring for source files. Ctrl + S saves.

F3 on a picture, such as a PNG or JPEG, opens it in a built-in image viewer.

Dragging files over a folder in the list highlights it, and dropping puts the files in that folder.