Some explanation of the information in the Grids is necessary:
Main Grids
Number - the values in this column show the consecutive number of the point in the grid. It is not a value that was extracted from the GPS unit. This is not a number you should try to change - it is there simply for referencing the Point in the grid
Ident - This is the Identifying name or "ID" of the point that was used in the GPS unit. It can be changed/edited as needed.
Latitude/Longitude, "as GPS Points" - these columns show the coordinates of the point as contained in the GPS database. It is IMPORTANT to understand that in all cases, the GPS units maintain an internal database in WGS 84 datum - the native format designed for satellite/GPS work. Most GPS units will DISPLAY the points in several different datums, but they are maintained internally in WGS 84, and this is the format that is downloaded from the GPS.
Altitude - if the GPS unit maintains the altitude of the point in it's internal database, it is downloaded and shown here. As with datum projections, most GPS units show the calculated altitude on the screen, but relatively few units maintain the altitude in the database. More about Altitude can be found here
Symbol - This columns shows a text description of the Symbol number used by that point. Different GPS units have different Symbol libraries, and the correct library is used in this column, based on the Setup selections. You can change the symbol by clicking the Edit button, and then clicking in the Symbol column - a drop-down selection box will appear and you can choose a new symbol. If you are in doubt about the symbol to use, try "Waypoint" as this is like a default for most GPS units.
X(Easting), Y(Northing), Zone, "as CAD Points" - These columns show the calculated coordinates based on the selected Datum and Units from "Setup".
Comment - This contains the comment contained in the GPS point database. In many cases, the default comment is a date/time value that the point was entered, or some other default values assigned. Check your users manual for the values that are placed here by default.
Direction Distance Grids
The Direction Distance grids show the information from point to point of those shown in the main grid to it's left.
Number, Ident - these columns are extracted from the grid to the left, showing the consecutive number of the point and it's given identification
Direction - the direction is calculated as an azimuth (0 to 360) in Degrees, based on a simple geometric calculation of the Grid coordinates (as CAD Points) of each point. No attempt at showing differences between True North and Magnetic North is made. Note the Units drop down box above the grid. This can vary the Distance value shown in the grid, based on the selected units. More about this is found here.