You can type down to one point if you want, or up to
200pt. Before or after typing press and hold ctrl and the
left square bracket key (next to key 'P'). each time you
press the bracket key yhe font size decreases by one
point. - watch the size shown in the toolbar. On the
other hand the font size can be increased to 200+ by
using the right bracket key (next to 'enter' instead.)
Or as the previous helper suggested, just highlite the
font size on the toolbar and type in whatever size you
want. -Hey Presto. To exit, either press ctrl+spacebar,
or click the font size box to select a standard size.