in Microsoft word you can do --> and it formats into an arrow
You can set this up in Pages as well:
Select
Preferences > Auto-Correction.
Enable
Symbol and text substitution, if it isn't already enabled, and be sure to uncheck any corrections you don't want.
Press the
+ button to add a new, empty correction.
Type "-->" in the
Replace field.
For the
with field, select
Edit > Special Characters....
Make sure the toolbar is visible in the
Character Palette window (use the lozenge-shaped widget at the far right of the title bar), and set the view to "Roman," if it isn't already.
Select the
Arrows category, and choose the arrow that best fits your needs (double-click it while the
with field is still active). Be sure to tab out of the
with field to commit the change.
Now when you type "-->" followed by a space, tab, or return, it will be replaced by the arrow character.
As for option-up-arrow, that has special meaning to Pages (move the insertion caret to the beginning of the paragraph). If you want to override this behavior, you'll need to look into some sort of 3rd party macro software.
Titanium PowerBook Mac OS X (10.4.9)