There are essentially 2 ways to add Text to your diagrams.
You can add text to any object using the Edit Text button from the object's contextual toolbar. This will reveal the Text Edit toolbar, and you can simply start typing.

Click on the Text Element Button (from the Main Toolbar) and click anywhere on the drawing canvas to start typing. When you're done, hit the TAB key to commit your Text or ESC to Cancel.

The Text Edit Toolbar appears under your Text each time you enter Text Edit mode. This is where you can format text, position text elements, add hyperlinks, etc. We love our contextual Text Edit toolbar and we hope you enjoy using it. Here's a button-by-button run down of the Text Edit Toolbar.
Text Position button
The first button is the Text Position button. Text Position lets you choose the relative position of the text field to its parent shape.

Word Wrap Button
The second button on the Text Edit toolbar is the Wrap Text button. Text in Creately is wrapped within the object by default. Click this button to unwrap text
Wrapped Text (default mode)
Unwrapped Text
Text Formatting buttons
This set of buttons let you easily set the Font face, size and style (Bold, Italics, Underline). We currently support a fine list of Open Fonts.

Text Color, Alignment and Bullet buttons
The second row of buttons lets you set a Text Color, align Text to the Left,Right, Center or Justified.You can also create an unordered list with bullets.
Create Hyperlinked Text
The final text field on the Text Edit Toolbar lets you create hyperlinks to external web locations. This is great for Sitemaps and Wireframe Mockups. Simply enter any web URL (e.g. http://www.yahoo.com) to create hyper-linked text and hit TAB to commit your change.

Comments
Disappearing Text
At times my text will appear to fit fine within its given shape, only to be cut off later in the same work session. Also, my text can appear to fit in the shapes, but when I go to export the diagram, the text in many of the shapes is cut off.
I'm having the same problem
I see text when creating in Creately. I export the file and the text does not appear.
Anyone have suggestions for what I'm doing wrong? Or is this a bug?
Same issue
Any response on why the text disappears when exported?
Hyperlinks when sharing a diagram
I can't find an option that allows me to keep the hyperlinks visible when sharing a diagram.
I wonder if it is possible?
,
Jeroen