Zoom
The Settings->Zoom submenu allows you to change
the magnification. You can choose one of the predefined
settings or you can specify an arbitrary setting using
Settings->Zoom->User Defined. The magnification value may
be entered as either a percentage or a decimal
value. For example, either 150% or 1.5 to zoom by a factor of 1.5.
You can also change the magnification using the zoom function in the
status bar. Click on the decrease button
to reduce the magnification or on the
increase button 
to increase the magnification,
according to the list of preset values. Alternatively, you can
double-click to open the zoom dialog box or menu-click on
the percentage value to open a popup menu.