The Edit menu contains commands for working in the Data window.

Undo may be used remove the last change made to either the Marker or Control Point tables.

Cut may not be used in Prefit.

Copy may be used to copy data from the Markers or Control Points tables. It may also be used to copy the contents of one of the view windows into a picture or metafile, which may then be pasted into other programs.

Paste may be used input data into the Markers table.

When a row of the Markers window is selected, you may insert a marker below the selected row. The new marker is given the same position as the selected marker, and you can then edit the marker and height (initialised to zero) to the required position. No sorting is done, Prefit assumes you have inserted these points in the correct order.

When a row of the Markers window is selected, choosing Delete Marker will delete that marker point from the marker table.

When you select Add Station, a dialog appears asking for the station position, and the number of points you will use in the definition of that station. The station position is sorted into place with respect to the other stations in the marker table, and all marker offsets and heights are initialised to zero.

When you select Delete Stations a dialog appears asking for the numbers of the first and last contiguous stations to be deleted. Type in the new numbers, click the OK button, and markers on the chosen stations will be deleted.