1. the extension for external cast file in Director entral tandard ime, time zone of Midwestern United States. One (1) hour earlier than EST, one (1) hour later than MST, and two (2) hours later than PST. Six (6) hours earlier than GMT. cursor - 1. a visual element used to indicate one's position on a computer screen. Common cursors include an arrow, an hourglass, or a watch. Command-line interfaces often use a blinking underscore or solid rectangle to indicate the insertion point. See LF. 2. a Lingo command which sets the cursor.