Use a button to advance a lesson step

Goal: move the lesson on to the next step when a learner presses a button.

A button does nothing on its own. You connect it to a lesson step in Scenario Setup.

Plan first

Work in this order:

1. Decide which lesson steps should wait for a button press.
2. Place those buttons with Button Injection. See Put a button on a machine, Put a button in the room or Make a part of a machine clickable.
3. Build the lesson in the Scenario tool, picking each button from a list.

Connect the button

1. Open ALF > Scenario Setup Tool. In tab 2 Steps, click the step that should wait for the press, and switch to Environment & Flow.

2. Under Completion Trigger, choose the Trigger Method that matches the button:

   Your button is a…	Choose
   Flat button	Press a flat button
   Push button model	Press a hand-pressable button
   Clickable part	Press a hand-pressable button
   Flat button with Also react to being touched	Either one

3. Pick your button from the Button list. Each entry shows the button's name, kind and where it sits.

4. In tab 3 Generate, press the generate button, then save the scene.

More on the other ways a step can finish: Choose how a step finishes.

Other things a button can do

To make a button move a part of a machine, see Kinematic Editor Tool: Add buttons that move the parts.

Good to know

• The list is empty? You haven't placed any buttons yet. Press Open Button Injection in the Scenario tool to place one.
• Use clear, unique names like Start or Open valve. That's how you'll recognise the button in this list.
• Existing connections are kept. If a step was connected to a hand-made button before, the Scenario tool warns about it but doesn't remove it unless you pick a different button.