Alternatively referred to as the I-cursor, the I-beam pointer is a mouse cursor shaped similar to the capital letter "I" that indicates that the text can be highlighted, inserted, or changed. In the picture is an example of how the I-cursor may appear.
Example of an I-Beam pointer
How to use the I-beam pointer
To select a word with the I-beam, double-click in the middle of any word and to select an entire line of text or paragraph click the button quickly three times. To select a portion of text, click at the beginning or end of the text and while holding down the mouse button drag left, right, up, or down.