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The charts are arranged in tabs at the top. Tabs can be added, removed and renamed. Currently, each tab has a fixed 3 column layout. To rename a tab, simply click on its label and use the dialogue window.
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Can I remove or modified a Chart Widget?
In dashboard, Charts are contained in "widgets" that can be added, removed and modified. Hovering over the widget title will display a title bar that can be used to drag and drop the widget to a desired position on the page. Widgets can be moved to different tabs by dragging and dropping them over the tab name that you wish to move to.
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Clicking 
will delete the widget.
How to access the preview ?
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