When you are writing content with two voices sharing the same staff, Flat put the stems of one voice upward, and the stems of the other voice are facing downward.
![](https://blog.flat.io/content/images/2020/10/2-voices.png)
Sometime the stems direction is not the more appropriate:
![](https://blog.flat.io/content/images/2020/10/2-voices-wrong.png)
We just added a tool that comes handy in this kind of situations: you can now swap the voices assigned to the selection. To do so, make a range selection, then click on the voices button. Finally, click on the Swap voice button.
![](https://blog.flat.io/content/images/2020/10/swapping-voices.gif)
I hope this tool will make the composition process easier for you!