From August 1996: A preview issue, presented free with the regular Titan STAR TREK MAGAZINE (the eighteenth issue) to tease the impending launch of the standalone STAR TREK: DEEP SPACE NINE - THE OFFICIAL POSTER MAGAZINE.
Visual Imagination had been publishing a NEXT GEN Poster Mag (a rare dalliance into actually acquiring the license to something) since 1991 so it seems that, by mid-decade, their rivals had started to notice and launch their own "me too" incarnations. Titan had this and Marvel had their DOCTOR WHO and BLAKE'S SEVEN versions.
Titan had dabbled with a spin-off STAR TREK GENERATIONS poster magazine in 1995. It ran for four issues.
The format was the usual features on one side/ giant poster on the reverse formula.
Only fourteen regular issues appeared before Titan called time. Presumably sales didn't amount to much or the costs or terms of the license, going into the second year, changed or were too great.
It was edited by the ubiquitous John Freeman.