There are a number of ways to add text to a document. You can replace placeholder text in a template; add text in a text box outside the main document body, such as in a sidebar; and add text inside a shape.
Do any of the following:
Add body text in a blank template: Just start typing.
Add body text in a template with placeholder text: Click the placeholder text to select it, then start typing.
The entire block of placeholder text is replaced by what you type.

In a page layout document, all text is contained in one or more text boxes. In word processing documents, you can have text in the main body of the document, then add text boxes for things like sidebars and captions.
Click where you want the text box to appear, then click
in the toolbar.
A text box appears on the page.
Begin typing—the placeholder is replaced by what you type.
Drag the text box to where you want it on the page.
If you can’t move the box, click outside the box to deselect the text, then click the text once to select its text box.
If you want to resize the text box, do one of the following:
If the text overfills the box: Select the text box, then drag the clipping indicator (+) until all text is showing.
If the text box is too large or too small for its text: Select the text box, then drag any selection handle (the squares around the border).

To delete a text box, select it, then press Delete.
The text box itself is an object that can be modified like most other objects; you can rotate it, change its border, fill it with a color, layer it, and more. There are text-specific controls for changing the appearance of text within the box—including its font, color, size, and alignment.
If you just added the shape, begin typing. If you’re adding text to an existing shape, double-click the shape to make the insertion point appear, then type your text.
If the text overfills the shape, a clipping indicator (+) appears at the bottom of the shape. Drag the handles on the shape to make the shape larger, or reduce the font size.
You can change the appearance of text within the shape just as you can for other text.