One week ahead of her planned testimony, Ivanka Trump has appealed Judge Engoron's decision to require her to testify in person at the Trump Organization's fraud trial.

Ivanka Trump's lawyer Bennet Moskowitz asked an appellate court to decide whether Engoron has jurisdiction to compel her testimony and whether the trial subpoenas issued by the New York attorney general were properly served.

Ivanka Trump, who is not a defendant in the case, is currently scheduled to testify next Wednesday as the final witness in the attorney general's case before the defense presents its case.

Donald Trump Jr. has arrived at the New York State Supreme Courthouse with his attorney.

Unlike his father and his brother Eric Trump -- who have visited the courtroom to watch the proceedings – Donald Trump Jr. has not stepped foot inside the courthouse for the trial until today.

A Trump Organization executive vice president, Trump Jr. is scheduled to testify in the case this afternoon.

Defense lawyer Jesus Suarez spent the first hour of his cross-examination working to cast doubt on expert Michiel McCarty's analysis, which found that Trump defrauded lenders out of $168 million in interest.

"Who created the universe of documents for you to review? It was the New York attorney general, right?" Suarez said before launching into a rapid-fire succession of questions regarding which lenders McCarty had spoken to in the course of his analysis.

"Did you ever interview anyone from Deutsche Bank?" Suarez asked.

"No," McCarty said.

"Did you ever interview anyone from Ladder Capital?" Suarez asked.

"No," McCarty repeated.

"Did you ever interview anyone from Mazars," Suarez asked.

"No," McCarty responded.

"Did you ever interview anyone from the Trump Organization?" Suarez asked.

"No," McCarty said again.

Only 15 minutes into what is expected to be a three-hour cross-examination, Judge Arthur Engoron snapped at defense lawyer Jesus Suarez for asking redundant questions.

"I see why this is going to take two or three hours. Some questions become three or four more questions," Engoron said, interrupting the cross-examination to request that Suarez shorten his questions.

That prompted Trump lawyer Chris Kise to criticize Engoron for placing an unfair standard on the defense team.

"You never give them speeches. You never limit their questions," Kise said about Engoron's approach to the attorney general's legal team. "I think it's unfair."

Kise stressed that the cross-examination of the state's sole expert witness is particularly important since his testimony is likely to play into the judge's calculation of Trump's potential fine.

"This witness is the only witness they have that even hints ... about ill-gotten gains," Kise said.

Engoron, however, refused to back down.

"I stand by my rulings and statements," the judge said.

Donald Trump Jr. testified he largely ignored a 2017 email from a Forbes magazine reporter who asked about the false claim that Donald Trump's triplex apartment in Trump Tower was 30,000 square feet -- about three times larger than its actual size.

Forwarded the message by a Trump Organization executive in 2017, Trump Jr. replied, "Insane amount of stuff there," according to material entered into evidence.

Asked about the email, Trump Jr. said he largely ignored the lengthy email and did not act on it.

"I don't know if I would spend hundreds of questions' worth of time answering questions from Forbes magazine," Trump Jr. said. "I have no specific recollection of doing anything with it."

Despite the error being called out, Trump Jr. and then-CFO Allen Weisselberg still signed off on Trump's 2016 financial statement that falsely claimed Trump's triplex was 30,000 square feet and worth $327 million, according to the New York attorney general's complaint.

Judge Engoron later paused the proceedings for the court's morning break. On his way out of the courtroom, Trump Jr. stopped to chat with the court's sketch artist.

"He said, 'Make me look sexy,'" the artist, Jane Rosenberg, told reporters.

Rosenberg famously sketched Trump Jr.'s father during his arraignment in the Stormy Daniels case, with her work landing on the cover of New Yorker magazine.