Trump White House aide Madeleine Westerhout testified that Trump did not use email or a computer.

"What is Mr. Trump's preferred method of communications?" prosecutor Becky Mangold asked.

"He liked speaking to people in person or over the phone," Westerhout said.

"Did Mr. Trump use a computer?" Mangold asked.

"Not to my knowledge," Westerhout said, adding Trump did not use email.

"He liked hard-copy documents," Westerhout said.

Westerhout testified that Trump paid attention to details and signed things himself, preferably with a Sharpie.

"He preferred to sign things himself," Westerhout said.

"Did he typically read things before signing them?" Mangold asked.

"Yes," Westerhout said.

Jurors saw a map of the West Wing of the White House to demonstrate where Madeleine Westerhout's desk was in relation to the Oval Office.

"That is the area known as the outer oval office -- that is where the presidential secretaries or assistants sat," Westerhout told the jurors, highlighting the location of her desk.

Westerhout said she sat near John McEntee, Hope Hicks, and Keith Schiller, but no one sat closer to Trump's desk in the Oval Office than she did in the early days of the Trump administration.

"Who was the focus of your job?" prosecutor Becky Mangold asked.

"The president," Westerhout responded.

Before she worked in the White House, witness Madeleine Westerhout worked at the Republican National Committee.

On the stand, she testified about the aftermath of the release of the infamous "Access Hollywood" tape.

"It was a tape of Mr. Trump and Billy Bush," she said. "At the time I recall it rattling RNC leadership."

Prosecutor Becky Mangold asked, "Did the RNC consider replacing Mr. Trump as a candidate?"

Westerhout told the jury, "It's my recollection there were conversations how it would be possible to replace him as the candidate if it came to that."

Westerhout testified that after Trump won the election, she helped with the presidential transition.

She said she earned the nickname "Greeter Girl" in the media after she helped coordinate meetings at Trump Tower, appearing in videos and photos accompanying potential Trump appointees in the Trump Tower lobby.

Prosecutors have called their next big witness: Madeleine Westerhout, who was Trump's director of Oval Office operations in the White House.

Westerhout was subpoenaed to testify.

Asked if she is nervous to testify, she responded, "I am now." This is her first time in a courtroom, she said.

Trump leaned forward in her chair, watching her intently.

Jurors saw photos of some of the merchandise Stormy Daniels sells on her online store, including T-shirts, comic books and a "Stormy Saint of Indictments candle."

Defense attorney Susan Necheles used the line of questioning to again suggest that Daniels makes a "large part of her livelihood" by selling the story about her alleged affair with Trump.

Necheles suggested Daniels is well-practiced in making up stories about sex, pointing to her career in adult films.

"You have a lot of experience of making phony stories about sex appear to be real?" Necheles asked.

"The sex in the films is very real, just like what happened to me in that room," Daniels responded, adding that if she were to fictionalize her encounter with Trump, she "would have written it to be a lot better."

Trump attorney Todd Blanche let out a chuckle at one point when Daniels, in referring to the sex in adult films, said, "I think we all know how to do that."