by holding down the Ctrl and scrolling up to zoom in and down to zoom out.
The wheel button can open a web page in a tab by pushing down the wheel on any link. Pressing down on the wheel will acts like a third mouse button. However, this wheel can also do so much more, below are a few examples. Today, everyone is familiar with a mouse wheels ability to scroll up and down on a page. Note: This tip does not work in the above box and has to be done in a text editor or word processor. Highlighting text this way is useful if the paragraph or other text is in a column. Holding down the Alt while dragging and highlighting text in a text editor allows you to selectively highlight text.
