How do you place redstone dust?

How do you place redstone dust in Minecraft Pocket Edition. I looked at my redstone book but it doesn't tell you. I've tried just placing it like a block too but it doesn't work.


As of Pocket Edition Alpha 0.13.0 (released on 19th of November 2015), redstone dust can be placed on opaque and transparent blocks, upside-down slabs, upside-down stairs and hoppers. To place it, tap on a block while holding on redstone dust.

Source: Redstone on Minecraft Gamepedia


Redstone dust cannot be placed in pocket edition, it is a crafting material, nothing more.