All changes Donald Trump has made to White House office after being re-elected as president

Donald Trump returned to the White House earlier this week and has already started remodelling the Oval Office to meet his needs.

Have you ever sat and wondered what the average workday of a US President actually looks like?

Yeah there's press conferences, photo ops and meetings with other world leaders - but what else do they do in order to fill the workday?

We may never know the specifics of what goes on in the Oval Office but it's reasonable to assume they spends a lot of time in there - which is why each president adds personal touches to the iconic space.

So what changes has President Trump made - and does he really have a Diet Coke button?

Here is everything we know about how Donald Trump has changed the oval office:

Family photos, different portraits and military flags can be seen in Donald Trump's Oval Office (Jabin Botsford /The Washington Post via Getty Images)

Swapping out Biden era portraits

While Joe Biden was in office, he hung portraits of several key figures in US history, such as placing an image of founding father Benjamin Franklin near his desk and hanging one of President Franklin D. Roosevelt near the mantle.

According to an update shared by the Associated Press, Trump has since swapped the portrait of Franklin out for one of Andrew Jackson - the seventh US President who has a controversial legacy.

Trump has also swapped the Roosevelt image out for one of George Washington.

It's also been reported that Trump has returned a bust of former UK Prime Minister Winston Churchill, which appeared in the Oval Office during his first presidency.

Military flags

Another addition includes returning the five military service flags - with one to represent each branch to surround the desk.

Changes to the Oval Office, including the lighter rug, can be seen in photos (Jabin Botsford /The Washington Post via Getty Images)

A lighter Oval Office rug

Biden had used a dark blue Oval Office rug during his tenure with Trump swapping this one out for the lighter, neutral one seen during his first tenure in the White House.

Personal photographs

Presidents will also bring various photographs of family members and loved ones into the officer to give it a personal touch. Photos of Trump's Scottish mother Mary Anne MacLeod Trump can be seen in the background of the Oval Office, alongside images which show his children.

The infamous 'Diet Coke button'

During Trump's first tenure, there was much fanfare about a rumoured Diet Coke button which the President had installed in the Oval Office.

Rumours stated that Trump was able to press this button and an aide would appear with a can of Diet Coke - the former businessman's favourite drink - in order to quench his thirst.

The Presidential Call button aka Diet Coke button is on the left side of the desk (Anna Moneymaker/Getty Images)

But it would appear the fabled Diet Coke button was slightly exaggerated as it made its way around the internet.

A Presidential Call button has long existed on the has long existed on the famous Resolute desk, which allows aides to be called into the Oval Office when needed.

However, this feature was primarily used as a signal from Trump that he had a hankering for the fizzy stuff while at work - and the rest is history.