The user can select entities as three ways in the creating selection area.
Figure 1 Select Method icons in the Select Toolbar
Select by Rectangle
To create a box area, pick one point with the mouse left button and drag it to second point holding on the button.
Select by Circle
To create a circle area, pick one point with the mouse left button and drag it to second point holding on the button. The first point means center of the circle and distance between first and second point means radius of the circle.
Select by Polygon
To create random area, pick multi points with the mouse left button and click Finish Select Operation on the mouse right button menu at last point. A polygon does not need to satisfy the close loop. RecurDyn automatically generates an additional line that can be connected to the first point and the last point to make the close loop polygon. The number of the connection point cannot have limitation.