Tab and Shift+Tab select the next or previous part; past the last part, Tab leaves the schematic. Arrow keys move the selected part, or, with nothing selected, move the keyboard cursor. Square brackets move the cursor to the previous or next pin of the selected part. Press W for the wire tool, then Enter at the cursor to start, bend and finish a wire. While placing a part, arrows move it and Enter places it. Enter edits the selected part's value. Press F8 to hear what is under the cursor or selected. Ctrl+K places parts by name or value. F7 opens a text outline of the schematic.