Use third-party applications, use built-in notes applications, etc.

1. Use third-party applications: download and install third-party applications that support handwriting input, such as Notability or GoodNotes. The application provides a wealth of drawing and note-taking tools, and you can write freely on the iPad.

2. Use the built-in note application: Open the built-in note application, and after creating a new note or opening an existing note, start writing in the blank with ApplePencil.