Zbrush - Alpha extruding

Hi guys,

i hope you can help me, so what is my problem

i import a mesh (cylinder) in to zbrush, it's mapped

i import an alpha, make it as a mask and can't figure out how to extrude those unmasked parts - i know i can use transpose, but i want to extrude in all directions of that cylinder (i hope you know what i'm talkinb about %)

[Blocked Image: http://images.tinypic.pl/i/00401/8xyq2fias2xw.jpg]

ok, i've found the solution,

deformation/size (Z/X axis)

thanks anyways

EDIT

stil i have one question, does anyone have an idea why my uv's in zbrush are vertically and horizontally switched (not like in Maya) ?