|To equip Materia go in to your menu and go to
'Materia' here you will see different amounts of slots depending
on your equipment. Click on a empty slot to bring a choice on
Materia that you have collected. When you put the cursor over
a piece of Materia a menu will appear, telling you how this
piece will affect your statuses. When you have decided on a
piece, click on it and it will appear in the slot. If you wish
to take a piece of Materia out, press the triangle button.