Some characters, such as some Greek letters and Asian logograms, can take up either one or two cells in a terminal window. These characters are often referred to as ambiguous characters. By default, these characters are displayed with a narrow width in Terminal, which looks better in situations where perfect layout is important, such as in ASCII art. You can change your profile preferences to display ambiguous characters as wide, which can be better if you are reading running prose.
Press the menu button in the top-right corner of the window and select Preferences.
In the sidebar, select your current profile in the Profiles section.
Open the Compatibility tab.
Set Ambiguous-width characters to Wide.
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