Using Markers

Right-click any track and select Add Marker. The marker will be created at the current position of the timeline cursor.

Alternatively, press M on the keyboard

You can delete markers the same way as any timeline item: select them and press Delete on the keyboard. For more details, see this article.

You can copy markers the same way as any timeline item: select them and press Ctrl + C on the keyboard. For more details, see this article.

You can paste markers the same way as any timeline item: press Ctrl + V on the keyboard. For more details, see this article.