Hit "O" to go into your Social Menu and click on Macros. Find on open macro and click on Edit Macro. From here you will be able to name the macro and pick the icon it will use. Name it whatever you want and choose whichever icon you want.
Next, you will see a drop down menu with four options: Command line, use item, use spell/ability and equip item. For the macro you are trying to create, you want to pick the command line option. Make sure the drop down menu has Command Line selected and then hit the button to the right entitled Add Step. You will see this step populate in the previously blank space below. Type in what you want to say and you should be set. The macro should look like this.
1: /gsay Get this add off me, healer in trouble.
The /gsay is not necessarily needed, but it seems that you will most likely be using this macro in a group. If the /gsay is absent, the macro will populate your currently selected chat channel (i.e. say, guild, etc.). By having the /gsay, you avoid sending an unintentional mistell and avoid the players in your group missing an important message. You can have up to 10 steps on any given macro. Play with it a little bit. You can do a lot.
After you have created the macro, all you have to do is drag the icon to an empty space on your hotbar for easy access.
Edited, May 14th 2007 1:40pm by Mearyk