To Achieve a Large Print Desktop

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Use the Appearance preference tool to select the Large Print theme.
Click the Apply Font button to increase the size of the font that is used on the desktop and on window frames.
Use the Desktop Font option in the Font preference tool to increase the font size that is displayed on desktop background objects.
If the Use System Fixed Width Font option is selected on the General tab of the Terminal Preferences dialog, the terminal uses the font size that is specified in the large print theme that you selected. However, if the Use System Fixed Width Font option is not selected, click the font selection button to increase the font size that is used to display text in the terminal.
Determine the gedit font size.
If the Use Default Theme Font option is selected in the gedit Preferences dialog, gedit uses the font size that is specified in the large print theme that you selected. However, if the Use Default Theme Font option is not selected, increase the font size that is used to display the contents of the gedit text editor window.
Note - If you use applications that use panes, such as the File Manager and the Help Browser, you might need to change the size of panes to accommodate large print. See the online help for the appropriate application for more information.