The Ink to Shape feature allows users to convert ink to shape, while Ink to Text converts ink to text. The reason why ink to text is grayed out in OneNote is that the ink text is not selected. To use the ink to text feature, follow the steps below.
Click the Draw tab and select a Pen.
Write a text.
Select the text.
The Ink to Text button is now enabled.
Click the Ink to Text button.
The ink will be converted to text.