Questions: 1) Why is it useful to display formatting marks in a document? To assist with insertion point placement when editing a document. To view the formatting applied to a picture. To determine the font size used in the document.

The answer is the first one: To assist with insertion point placement when editing a document.

Explanation for each option:

1. To assist with insertion point placement when editing a document.

   • This is correct. Displaying formatting marks, such as spaces, paragraph marks, and tabs, helps users see the structure of the document. This visibility aids in accurately placing the insertion point for editing tasks, such as adding or deleting text, ensuring that changes are made precisely where intended.

2. To view the formatting applied to a picture.

   • This is incorrect. Formatting marks do not display the formatting applied to pictures. They are primarily used to show hidden characters related to text formatting, not graphical elements.

3. To determine the font size used in the document.

   • This is incorrect. Formatting marks do not indicate font size. Font size is typically viewed through the document's formatting toolbar or style settings, not through formatting marks.

In summary, displaying formatting marks is particularly useful for editing text by showing hidden characters that affect text layout and structure.