If the dataset already contains observations two options to proceed are presented.
With the first option a new plot observation can be assigned to an existing plot. This occurs if a plot is visited more than once as is the case for permanent plots.
With the second option header data from the currently selected plot can be copied, which may save,but can also lead to errors. Optionally the geo location of the selected plot may also be included.
For further explanation see Edit plot observation.