Final answer:
To add a text box using the "Add Content" menu, click the icon that typically resembles a T, a pencil, or is labeled "Text" or "Text Box."
Step-by-step explanation:
When utilizing the "Add Content" menu to incorporate various types of content into a webpage or a blog post, a specific icon represents the function to add a text box. While the question does not specify the platform or the icons in detail, typically, the icon to add a text box could resemble a T or a pencil symbol, or it could say "Text" or "Text Box." This is a common convention across many content management systems and website builders.
To add a text box, you would click on this icon, which then allows you to type in or paste your text into the new content area that appears on your page. Remember to follow similar steps for adding other types of content, such as an image by clicking the "Add Image" icon or a web link by using the icon with a green globe or the word "Link."
The icon within the 'Add Content' menu that allows you to add a text box is the 'Text' icon. This icon typically looks like an uppercase 'T'. When you click on it, you can enter and format text in the text box.