Hi Mi,
To have a number instead of points, you can use the column containing the numbers as markers. To treat a column as a marker, right click on the column panel and choose "use for marker".
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To move points that are on top of each other, you can use both a row and column label. These always appear on a graph unlike a hover label and can be moved by dragging the label. To add a row label, select all rows then right click-Label.
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For the resolution of the background map, I have had the most luck with the street map service when zooming into specific latitude/longitude points.
-Olivia