When creating design and video projects, you can rearrange the artboards to organize them in the order that you want.
Just follow these simple steps:
1 - On your workspace, go to Design or Video
2 - Find the project you want to re-organize by clicking Projects on the left side menu
or Start a new project by clicking New Blank Project or New Video, or by Browsing Templates on the top menu on the Home screen
3 - In your project, click the Arrange artboard button on the top right corner pf the editing menu on the bottom of the screen
4 - Click on the artboards you want to rearrange and drag them to the position you want them to be.
5 - Once you're finished re-organizing, click the dropdown arrow next to the number of artboards on the top left corner of your screen
That's it! If you open your Timeline, you'll see your artboards are now rearranged!