posted on 2019-03-14, 17:44authored byFion Choi Hung Lee, Siu Shing Man, Alan Hoi Shou Chan
(A) full screen mode with a centre (+) location cue, (B) circular mode with a leftward arrow (←) location cue, and (C) fixed-area mode with a 45° inclined arrow (↗) location cue. The magnified windows are indicated by dotted lines.