Every project has a tempo, which is expressed in beats per minute (bpm). You can set the tempo in the Project Chooser when you create a project, and change it later while you are working. You can set the project tempo in the LCD in the control bar. By default, the tempo for new projects is 120 bpm.
When Show Advanced Tools is selected in the Advanced preferences pane, you can add tempo changes, and control the tempo of a Logic Pro project in a variety of ways, including:
When Advanced Editing Options is selected in the Advanced preferences pane, you can use the Tempo Operations window and Tempo Interpreter window for more complex control of the project tempo. When Advanced MIDI Options is selected, you can control tempo changes using the tempo fader in the Environment.