All/border
This option allows to define the way the points to measure are distributed on the face to measure.
This option is available when the parameter Points position = Automatic.
All
The points to measures are distributed on all the restricted face.
This measure is defined by a number of lines and on every line a step (Step on line parameter) between every point.
What is called a line is in fact the isoparametric lines of the face.
Example below with 8 lines:

Border
The points to measure are distributed on the edge of the restricted face.
This measure is defined by a number of points distributed in equal distance.

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