Writers are located in the Publishing information tab of your song projects. You may want to the songwriters to appear in a certain order on your shares/pitches.
Here's how to reorder songwriters:
1. To get to your writers, click the Publishing information tab in the song project and click the reorder icon that you should be familiar with from reordering your playlists.
2. To reorder your writers, drag and drop them in the position you wish OR use the icons on the right to move them to the top or bottom.