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By default, the toolbar is visible. To hide the toolbar, double click any white part of the toolbar.
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If the Toolbar is hidden, it will look like this:
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For example if you press "alt" and m at the same time, the Trip Manage drop-down will appear.
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In the dropdown, you see under each option a letter has been underlined.
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For example, if you now press c“c”, you will clear the screen.
To be clear, to clear the screen you would:
Press "alt" and m “m” at the same time.
Then you would press c.“c”