How to insert an image in a letter template

Hi Guys
I'm having trouble following the instructions for inserting an image into a letter template. The FMSpark manual says that you can "click in the appropriate image field" from the letter template layout. However, only the top left image box seems to make any difference to the preview (ie images put in any of the other boxes do not appear in the preview). Also, how does this grid of images correspond to the letter layout? I'm trying to put an image centre top above all the letter body text (I can achieve this by putting the image in the top left image grid - the one with the word Header beneath it) but I cannot add an image part way through the text on the left hand side.
Cheers for your help : )
I'm having trouble following the instructions for inserting an image into a letter template. The FMSpark manual says that you can "click in the appropriate image field" from the letter template layout. However, only the top left image box seems to make any difference to the preview (ie images put in any of the other boxes do not appear in the preview). Also, how does this grid of images correspond to the letter layout? I'm trying to put an image centre top above all the letter body text (I can achieve this by putting the image in the top left image grid - the one with the word Header beneath it) but I cannot add an image part way through the text on the left hand side.
Cheers for your help : )