A command to expand the current selection to the line before, which is something I need quite often.
Each time this command runs it will expand one line above.
After expanding, you can also contract the selection back by one line.
Both commands are available in the Selection menu and bound to the following keyboard shortcuts on Windows and Linux:
Expand Selection by one line Ctrl+Alt+Shift+Up
Contract by one line Ctrl+Alt+Shift+Down
Or similarly, on OS X:
Expand Selection by one line ^⌥⇧↑ (Ctrl+Option+Shift+Up)
Contract by one line ^⌥⇧↓ (Ctrl+Option+Shift+Down)