Select an option from the Curve Editor tab > Edit panel > Projections menu to specify how to project selected curves.
Drop — Select to project the selected pattern down the tool axis onto the part. The whole pattern must be contained within the part when viewed down the tool axis.
original pattern.
pattern dropped on to the part.
Flatten — Select to project the selected pattern onto the XY plane at Z = 0. The pattern need not be entirely contained within the part.
original pattern.
pattern flattened onto Z=0.
Embed — Select to display the Embed Pattern dialog which enables you to link the pattern lying on the model to its associated surface (or surfaces).