If you need to insert a function into a tag or expression field, you can use the Insert Function dialog box.
To insert a function into a tag or expression field:
To insert the function with its arguments included, select the Insert arguments box.
The function is inserted in the current field at the location of the cursor.
Note: If the total length of the function and its parameters is greater than 254 characters, it won't appear in this dialog box. Instead, the message "Text Too Big" is displayed.