Balloon
Application
A text balloon allows user to make a smaller, more targeted notation than a text box. The "point" on the balloon also allows the notation to be placed much more specifically than a text box.
Style
In Style property dialog it is possible to change the text format and appearance of a balloon text container:

General Options
Allows you to change the text color and font size.
Text Box
Text content of a ballon to be typed here.
Background
Allows to change the background color and opacity level.
Border Color
Sets the border color.
Coordinates
In Coordinates properties dialog you can set precisely the position of the balloon's point on the price scale (by setting the price) and the time axis (by setting the bar number):

Visibility
In visibility properties dialog you can switch the Balloon tool displaying on charts of different timeframes:
