You’re used to using the Typewriter tool in earlier versions of Acrobat; and can’t find it now. Don’t worry, its still there in Acrobat X.

Choose Tools > Content > Add or Edit Text Box.

Accessing the Add or Edit Text Box tool in Acrobat X

The Typewriter toolbar that you are familiar with displays. See Acrobat online help topic here to learn how to use the Typewriter toolbar.

{Tools | Comment | Share} are no longer menu items. They are called task buttons and are located on the top-right of the application window. When you click on these buttons, the task pane opens and display the buttons inside. The buttons are highlighted in the screenshot.

UPDATE 1

Update 2

Some more tips from the “Guru”, moved up from the comments below.

Anne-Marie Concepcion :

I’m not sure why you guys are having a problem with this, the Typewriter tool is working fine in my copy of Acrobat Pro X. In fact I added it to my QuickTools bar at the top because I use it so often.

After you choose the Typewriter tool (which is now called the “Add or Edit Text Box tool), you have to wait a few seconds for the system to read the fonts you have available, and then the floating Typewriter tool bar appears … the same thing you’d see if you pressed Ctrl-E.

I always wait till that comes up before I click and start typing. Once I’ve typed some text, I can drag over it with the same tool and change its font and size and color etc. from the panel menu.

If you move your Typewriter cursor over the invisible “edges” of the text box surrounding the typed text (I wish Acro would show these by default), it’ll turn into an arrow cursor and you can click to select the text box. Now you can drag it around the page.

Now … if I want to set a background color for what I type, or apply a color to the box edge, then I use the Text Box tool, which is a diff. tool completely. That’s a tool in the Comment section, in “Drawing Markups”. For *that* tool you do need to open the Properties floating panel (Ctrl-E) to change font size/color etc. but that’s how it worked in earlier versions too.

Anne-Marie Concepcion :

If you have the Text Box selected (you see handles on it), then the Properties tool bar (Command/Ctrl-E) lets you set properties of the box itself, like fill color, fill opacity, and line color. If you double-click inside the Text Box, it changes to “edit text” mode and the Properties tool bar changes to show text formatting controls, including font, style, size, color, paragraph alignment, and so on.