The "9" (which looks like the Japanese hiragana character for "no") in the 1993-2002 logo is also reversed into a "G" in the black bar with the "WGN" callsign; this logo was used by the national superstation feed of WGN-TV in promos and IDs until 1998, when only the "WGN" portion of the logo began to be used on the superstation feed.
Alternate variant with legal ID
Alternate version of logo with the logo for The WB on the bottom right of the "9" (1995-2002)
When this logo was introduced in November 2002, the 1999-2006 version of The WB logo was originally placed next to the boxed "9" in the logo; when WGN affiliated with The CW (owned by CBS Corporation and the Warner Bros. Entertainment division of Time Warner, owners of UPN and The WB respectively, and initially featuring some of both networks' programming) in September 2006, the logo was updated to include The CW's logo. A variant without the box "9" and network logo was used on the national superstation feed until 2008, when Superstation WGN rebranded as WGN America; since then, WGN-TV and WGN America do not use similar branding schemes.
Alternate version occasionally used online (2006-present)
WGN News logo (2002-present); though logo is rendered as "WGN 9 News", the station's newscasts are simply idenified as WGN News.
Station ID (2002-2006)
Station ID used during Illinois Lottery drawings (2006-present)
WGN-DT2 station ID (2006-2007, during affiliation with The Tube)