Get started with Logic Remote on iPhone
You use Logic Remote to remotely control many common functions in GarageBand—playing and navigating projects, recording, mixing, and automation.
To show coaching tips with helpful information about the current view, tap the Settings button 
in the control bar, then tap Coaching Tips. You can continue to use all controls while coaching tips are visible.
The first time you open Logic Remote, you’re prompted to connect to a Mac that’s running GarageBand, Logic Pro, or MainStage.
Logic Remote opens to the Mixer view, where you can perform some basic mixing tasks.
The control bar located at the top of each screen features navigation controls, a control bar display, and a Settings button. You can also show the ruler, which contains the playhead and cycle area.
The transport controls for playback and recording are located at the bottom of each screen, except in landscape orientation, when they are located at the top of the screen.
Switch between applications controlled by Logic Remote
You can use Logic Remote to control Logic Pro or GarageBand.
In Logic Remote, tap the Settings button
in the control bar, then tap the name of the currently listed Mac.In the connection dialog that appears, tap the icon for Logic Pro or GarageBand to control that application using Logic Remote.
Override the iPhone sleep settings
In Logic Remote, tap the Settings button
in the control bar.If the Allow iPhone to Sleep switch is turned on, tap it.
You might have to scroll down to see the setting.