Lisa Wilkinson's defamation trial evidence LIVE: The Project star's old tweets about metadata surface - as she faces court for a second day of tense clashes over Brittany Higgins story with Bruce Lehrmann's lawyer

Lisa Wilkinson took to the witness stand on Friday morning and was immediately asked if she stood by her response about metadata on Thursday.

On Thursday, she was asked why she didn't ask to see the metadata on a photo of a bruise on Brittany Higgins' thigh, which she claimed was from the alleged rape.

Wilkinson told the Federal Court that she was not 'tech-savvy' and did not know what metadata was.

Bruce Lehrmann's barrister Matthew Richardson SC asked her about three tweets she wrote in 2014 and 2015 - reading them to the court.

In a 2014 tweet, Wilkinson announced she would speak with former prime minister Malcolm Turnbull and Labor MP Tanya Plibersek about metadata on The Today Show.

'Talking to [Malcolm Turnbull and Tanya Plibersek] tomoz on meta-data privacy, surrogacy laws & that Clive Palmer bromance,' she wrote.

She tweeted about metadata again twice in 2015.

In the first tweet, Wilkinson appeared outraged that Jamie Briggs, former South Australian MP, threatened to use a Crikey journalist's metadata against him.

'I'll check your metadata, I'm sure I'll find something better!!' he wrote, at the time.

Wilkinson replied: 'The moment an assistant federal minister threatens to go through a journalist's metadata. Is that meant to be funny?'

Six days later, she wrote: 'Sorry, over 300,000 requests for #metadata are being made a year? How many are being approved? And who is arbitrating?'

He asked: When you read those tweets now, are you sure about your evidence that you didn't know what metadata was?'

She replied: 'This is from 8.5 years ago so I'm looking at it now.'

'What we talked about the other day were the specifics of a photo have information on it about when it was taken.

'Looking at this, I think I'm understanding that the point was about phone logs and emails and search histories.

'I didn't know photos had metadata.'

Mr Richardson asked: 'You describe yourself as a serious investigative journalist?'

She bit back, stating she only refers to herself as a 'journalist'.

Mr Richardson said: 'You were emphatic yesterday when you said you wer enot a tabloid journalist.'

She repeated: 'I describe myself as a journalist, Mr Richardson.'

He said she had been a journalist for 40 years, suggesting 'it was most improbable that you did not know what metadata was.'

She replied: 'I disagree.'