Quick help! Adding a text box....

[eyeshade]

I want to add a box to an already existing letter but every time I do this the text moves down, (I know thicko!) but how do I stop it moving, I want to add box to right hand side of normal letter. Quick help before boss gets in!!
ES

[rojash]

You get a usable answer quicker if you bothered to state:
Word processor
Version
Type of box