You can drag the Quick Bar to any position on the screen by clicking on the upper left hand
Quick Bar: The Quick Bar is used to engage abilities, spells, combat styles, macros and other things. For example, a Minstrel can use the Quick Bar to switch quickly between holding an instrument or a weapon, and an assassin can use Cronous Cro to envenom his weapons without having to drop the poison on the weapon.
You can create a Quick Bar macro by typing /macro name followed by the command you wish to perform. For example, you could make a macro that assists Grond by typing /macro Grond /assist Grond.
Each Quick Bar has ten slots on it, which correspond to the numbers on your keyboard (the 10th slot is activated by using the 0 button). To use the Quick Bar, drag a skill, spell, combat style or item onto one of the slots, then press the corresponding number on your keyboard, or click on the icon on your Quick Bar with the mouse.
The skill, style or spell may require certain circumstances to activate. For example, if you have no enemy targeted, you will not be able to activate a combat style or cast a targeted combat spell.
You can drag the Quick Bar to any position on the screen by clicking on the upper left hand corner and dragging it. You can alter it's orientation between horizontal and vertical by clicking on the circle on the upper right hand corner of the Quick Bar number display.