i go back home and think again...
the font of my wallpaper has nth special...
so i decide to make it special...
first i click on the font layer(happy halloween)
then put effect as shown
first put the drop shadow as shown
then put inner shadow as shown...
now much and how strong the shadow is...
and the last one is outer glow...
how strong the glow show on the picture below...
and heres my new wallpaper with new special font