Adding letters to board
Letters are typically used to mark interesting positions in board. Then commentor can refer to these letters in commenting.
First start by selecting letter 
tool. Then you add letters to board location simply by clicking
desired board location.
Adding symbol to board
Symbols are typically used to mark interesting areas or groups of stones in the board. Commentator can then refer to these areas or groups by using symbol(s).
First start by selecting general tool 
, if not yet selected. Then you should select
desired positions in the board. Finally you select symbols type from menu Insert > Add
Symbol.
Adding labels to board
Labels are typically used to mark special comment text to board.
First start by selecting label 
tool. Then click the board location where you want to add label.
GOWrite shows an dialog, where you should enter text you want to show in the board.
Deleting letters labels or symbols
When any of letter, label or symbol is visible in the board, it can be deleted by first selecting their location in
board and then pressing delete letters button 
in main toolbar.