Hi Yu Cai: You can see the ML designer tutorial documentation below.
https://learn.microsoft.com/en-us/azure/machine-learning/concept-designer?view=azureml-api-2
https://learn.microsoft.com/en-us/azure/machine-learning/concept-train-machine-learning-model?view=azureml-api-2 https://learn.microsoft.com/en-us/azure/machine-learning/how-to-manage-inputs-outputs-pipeline?view=azureml-api-2&tabs=cli