If you want to open up draw objects from the center instead of dragging from one corner to the other, hold down the <switchinline select="sys"><caseinline select="MAC">Option</caseinline><defaultinline>Alt</defaultinline></switchinline> key while dragging. <switchinline select="sys"><caseinline select="UNIX">With some window managers, you may need to hold down also the meta key.</caseinline></switchinline>