Barrie McKay insists he had no option but to leave Rangers after being told he had no future at Ibrox.
The Scotland winger has been reunited with former Rangers boss Mark Warburton at Nottingham Forest after signing a four-year contract in a £500,000 switch.
McKay knocked back the offer of fresh terms at the Govan outfit at the end of last season and was recently ordered to train with the club’s under-20s.
And the 22-year-old admits he discovered that he would be out of favour under Pedro Caixinha.
He said: “Recently it was made clear to me that I was perhaps surplus to requirements at the club, that’s football and you need to move on.
“It has been a memorable journey of highs and lows, from scoring at Peterhead in League 2 to, to the goal against Celtic in the Scottish Cup semi-final.
“I will remember being part of the squads who managed to return Rangers back to their rightful place in the top league of Scottish Football and competing in Europe.”
In a message posted on social media, McKay added: “I would like to wish Rangers FC and the fantastic support all the best for the future.
“I now look forward to meeting my team mates and the challenges ahead with Nottingham Forest.
“Nottingham Forest are a massive club steeped in history and they have given me a fantastic opportunity to grow as a footballer amongst a competitive squad and potentially one of the most competitive leagues in the world.”