The phrase "change topic" is correct and can be used in written English.
For example, "Let's change topic and discuss the project we have been working on for the past few months".
LF: I hate to change topic, but what are you working on next, Nicole?
But (probably desperate to change topic) we also talked about some relatively recent evidence for pieces of supernova impacting the Earth about 2.5 million years ago.
Professor Ben Polak: So today I want to look at two kinds of games and then we'll change topic a bit.
6.24pm BST Another question for Patrick! 6.23pm BST Fuz Wuz asks Patrick (to change topic slightly temporarily), How do you feel about the Chaos Walking Trilogy being cited as YA feminist fiction?
It is understood that theses will evolve after the proposal is submitted, but if they change topic, or if the supervisor(s) change, a new proposal must be submitted right away.
In many ways, becoming an editor is like becoming a student again - you go back to reading, learning and thinking about many different areas, and have to change topic several times throughout the course of a day.
Sometimes he will change topics altogether.
And there are a variety of commands to mute groups, change topics, list other members, etc.
Take deep breaths, exercise self control, and change topics.
Pauses can be used to change topics, re-energize the conversation, or even to take a short breather.
MM changes topic as quickly as she can and says she likes Yap and Ceedo.
