For example, to change the background color of the chart, double-click the background of the chart. Every chart window is an island. When you edit the colors, styles, parameters for any item in a chart window, you do not affect any other charts. Each Indicator dialog box includes a button that looks like a floppy disk with an arrow pointing into it. Click that button to save the current Indicator settings as the new global defaults.
Global chart preferences only affect new chart windows.
Existing chart windows and saved chart files are not affected. If you change the global preferences for Background Color from black to white, all new chart windows will display a white background. Any existing or saved charts will retain their black backgrounds. When you apply a Template, all of the settings in the current chart are discarded and replaced by the setting from the Template. Only the current chart is effected.