FF/FL Define test surface
This step helps to define the test surface and the FF/FL values to achieve.
Either define a test surface aligned or not to the current UCS (press SPACE to change the mode): use the scene to draw it.
Define the Specified Overall Flatness and Levelness values: that is to say for the test surface and the test sections.
Optionally, define Minimum Local Flatness and Levelness values: that is to say for each sample line.
Notes
The test sections defined in the next step will have to be inside the test surface.
In case of a single test section, you can define directly its position in this step.