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Number of rows - default setting is 50 rows, but you can pick 20,100 or everything you got 
. Just keep in mind that too big data can and will slow down grid loading.
Report list
Report list is just representation reports that are created.
Report list have context menu that opens on right click and consist of:
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Name
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Description
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Edit
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New
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Deactivate
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Copy report
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Preview report
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Favorite report
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Copy with header