The Manual button allows one to calculate the stations one by one after having previously selected the origin station in the window to the left of the dialog box and the target station from the target stations list. This method is useful when there are several ways to calculate the stations and it is preferable to the automatic calculation method.
If a backward observation to the origin station exists, the program displays a window containing information about the distances and height difference used in the calculation, in addition to the resulting original correction. Clicking the Edit button allows one to modify the observation data.
If, on the other hand, there is no backward observation, the target station coordinates are calculated and the origin station is changed in the dialog box.
If one clicks the OK button, the coordinates and the horizontal correction to the current instrument set-up are applied.