Board Thread:Game News/@comment-27403314-20140424165316/@comment-27403314-20140425154100

Yon can do the 2nd point by looking at the left of your screen, there should be a tiny square pop up, just tap on it.

The 3rd point is at the same place, there should be 3 sections:
 * Challenge
 * Global
 * Friends

The 2nd point can be found at 'Global' and 'Friends', while the third one can be found at 'Challenge'.