When you define a slab or a raft foundation, you can use the command line to specify parameters:
Pick the beginning point:
Pick next point [sElection / Arc]:
Selection
Select edge
Arc
Pick second arc point
Pick third arc point
Select object(s):
Finish [Side / Offset]:
where:
Side = the location of the reference edge (upper, lower)
Offset = the distance from the lower or upper level of a slab
Note: Lines, arcs, and polylines do not need to be located in the same plane. An element is projected on a specified plane as it is created.
First corner:
Second corner [Side / Offset]:
where:
Side = the location of the reference edge (upper, lower)
Offset = the distance from the lower or upper level of a slab
Select contour internal point
Select objects