Option + Arrow Up/Down

moves the line up or down

Option + Arrow Left/Right

Alt + Arrow Left/Right

moves the cursor to the next or previous logical grouping on the line

For example, if the line is System.out.println("hello"); and you start the cursor at the front of the line, it will move over each . then to ( then over each " then to the end of the line.

Option + Delete

deletes the previous logical grouping

Function (fn) + Option + Delete

deletes the next logical grouping