macOS Mojave 10.14
Use the Ink pad on Mac
The Ink pad is an area in the Ink window where you can write text or draw pictures to insert in documents.
In the Ink app on your Mac, do any of the following:
Show or hide the Ink pad: Click the Ink pad icon (looks like a notepad) in the toolbar of the Ink window.
Write or draw: Click the Write or Sketch button at the bottom-left corner of the Ink pad.
Insert text or pictures at the insertion point in an app: Click Send.