New

[Member] Tab > [1D Member] > [Sub Beam]

Delete

Work Tree [Model] Tab > [Member] > [Member Set] > [Sub Beam] > [List] > Right-Click > [Delete]

< Member Settings &  Insert Coordinates >

Set : Select member set.

Property : Select section property.

Enter the coordinates of start and end point of member.

(Relative Coordinate) : Select to define the coordinates of end point as relative coordinates of start point