To format indicator, double-click on it in the chart window or right-click on it and select Graph Component Properties.
Common indicator properties:
Each indicator has it's own set of parameters (inputs) - use this category of properties to work with input values of indicator. This inputs are indicator-specific. See Analysis Technique Parameters.
Use Line Indicator Properties to adjust following aspects of Line Indicator:
Use Histogram Indicator Properties to adjust following aspects:
Use MultiLine Indicator Properties to adjust properties, specific to Multiline indicator plots.
See also Applying Indicator.