Arranging : Time, Tempo, Meter, Key, and Chords : Timebase Rulers and Conductor Rulers : Displaying Rulers

Displaying Rulers
To display all rulers:
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Select View > Rulers > All.
To remove a ruler from the display, do one of the following:
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– or – 
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Choose View > Rulers, and deselect a ruler option.
To display only the Main Time Scale in the Timebase ruler:
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Select View > Rulers > None (Main Time Scale.)
To add a specific ruler to the display, such as the Markers ruler, for instance:
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Select View > Rulers > Marker.
To change the display order for the rulers:
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To copy the range selection from a Conductor ruler to make an Edit selection in the top track in the Edit window (or in the Notes pane in MIDI Editor windows):
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Press Control+; (semicolon) (Mac) or Start+; (semicolon) (Windows).