Button

Behavior

pick nodes in the graphic window, and then answer the question in the Dialog menu bar with Yes or Cancel.

add nodes by box selection (the default box is rectangular — use the SHIFT key to define a polygon box).

add/remove object by ellipse selection.

remove nodes by box selection (the default box is rectangular — use the SHIFT key to define a polygon box).

to add all nodes.

pick parts in the graphic window, and then answer the question in the Dialog menu bar with Yes or Cancel.

add parts by box selection (the default box is rectangular — use the SHIFT key to define a polygon box).

remove parts by box selection (the default box is rectangular — use the SHIFT key to define a polygon box).

add the parts selected in the tree.

remove the parts selected in the tree.

clear the selection.