The steps are:
- Create the post map in the plot window.
- Click File | Open, select the data file and click Open. It will open in the worksheet window.
- If the X and Y data columns are not columns A and B in the worksheet, click Data | Data | Assign XYZ Columns to assign the correct columns to your X and Y data columns.
- Click View | Windows | Tile Vertical to arrange the windows next to each other.
- Click Map Tools | Layer Tools | Track Cursor to enable cursor tracking.
- Click in the plot window near a point, and that point is highlighted in the worksheet window.
- Click in the worksheet window and edit or delete the point.
- Then click back in the plot window near your next point. Repeat.
- When finished, in the worksheet window you can click File | Save to save the edited data (or File | Save As to save it to a new name). Click File | Close to close the data file.
- To update the post map, from the plot window, click File | Reload Map Data. If you wish to update a contour map with the edited data set, you must regrid the data (Grids | New Grid | Grid Data) and then update the contour map with the new grid file.
In Surfer 14 and newer, a data file can be also be edited by creating a base map from the data file data. For additional information about this process see the article I want to extract all of my post map points within a polygon on my base layer. How can I do this?
See also: What Is Surfer's Track Cursor Command?
Updated November 2, 2018