Carlton utility Zac Williams looks a rejuvenated footballer since a conversation with his coach Michael Voss inspired a mid-season switch from defence to the forward-line.

Williams made his long-awaited return to football against Brisbane in the opening round of the season after missing all of last year due to a ruptured anterior cruciate ligament suffered during a pre-season training camp.

Despite a successful return, Williams found himself low on confidence and struggling for form in the following weeks after the Lions clash.

The 29-year-old told Channel 7 that his frustration with his output sparked a chat with Voss about a positional change.

"There was a period of time there, a couple of weeks before the Sydney game, where I was low on confidence," Williams told Channel 7.

"I probably wasn't playing the best footy that I know I can.

"It was a conversation with 'Vossy' about maybe a role change or playing higher up the ground.

"It's full credit to him, to have faith in me to go forward and be able to play a role down there – it was a good conversation to have."

It is a move that has paid dividends for both Williams and the Blues, with the former Greater Western Sydney player averaging three goals per game across his past three matches against Gold Coast, Port Adelaide and Essendon.

He has filled the void left by injured forward Jack Martin and only dual Coleman Medallist Charlie Curnow has kicked more goals for the Blues across the past month.

When Williams is not kicking goals he is setting them up and over half of his disposals since the forward-line switch have ended up in scores for his team.

Despite this being his 12th season at the elite level, he continues to add more strings to his bow, including the usage of his opposite foot.

"I don't think I've used my left foot as much as I have over my whole career like I have in the past two weeks," Williams said.

"Every time it comes off my left boot, I'm going 'oh wow, that's going through'."

Thursday last week marked a year since the tragic loss of Williams' sister Sammy after a battle with cancer and the Blues utility has paid tribute to her by writing her name on his wrist before every game this year.

He dedicated his first goal last week to Sammy by pointing to the sky, which he explained post-match.

"I thought I'd pay a tribute to her," he said.

"I know she'd be very proud, especially playing forward and kicking goals.

"I don't think it came off my boot too well, so I'm glad it went through . . . it was a little tribute to her."