How to promote people in my wow guild?

I've just started a guild in World of Warcraft and was wondering how to give promotions and etc. Thank you.

Hi,

Open up the guild screen by hitting the O key followed by selecting the guild tab. The guild must already be created and you must be a member of the guild. You will now see a guild listing with several different options.

Below the guild player listing you will find another area with a bunch of various buttons.

New Guild?
Group Invite - Select a player on the list, then hit this button to invite them into your party.
Guild Control - This will launch a control window pane where you can edit the ranks of the guild and set up permissions for each rank. This will be explained in detail further down the page.
Add Member - Press this button then enter the name of the player you wish to invite to the guild. Once they accept your invitation they will be added to the guild. If they do not accept you will have to invite again.

At the very bottom of the guild tab you will see:

Promote - Select a player on the list then hit promote to set their rank to a higher rank in the guild. A message will be sent to the entire guild that this player's rank has changed, so be careful when using it.
Demote - Select a player on the list and hit demote to demote that player one rank in the guild.
Remove - Select a player on the list and hit Remove to kick them out of the guild.