Used as a katakana version of 'left', often in labels, instructions, imported terminology, or contrast with ライト. For ordinary everyday direction, 左 is usually more natural.
See also: ライト
He has been playing left field since high school.
Selecting “Left” on the screen moves the image to the left.
left field; left fielder
Baseball term. レフト can mean the left-field position/area, or the player defending that position.
In high school, he played left field.
Today's left fielder has a strong arm.
The batter hit a big shot to left field.
ライト means 'right/right field/right fielder', the direct baseball and directional opposite of レフト.
Written in katakana and used like the English word 'left'; no explicit language-of-origin information is specified.