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Group Objects

May 20, 2011

     A group is a saved set of objects which you can choose and modify together or separately as needed. Groups provide an easy way to edit the drawing units as a unit. You can add or remove objects to or from the groups as needed.

     The objects within a group can be edited as a unit, which resembles blocks. However, the groups are saved from session to session. And you can easily edit individual objects in groups, but in blocks, you have to explode blocks before you edit them. Groups cannot be shared with other drawings.


Create Groups

     Entering GROUP command opens the Group dialog box, from which, you can give a name and description to create a group. If you copy a group, the default name is *Ax, and it is considered unnamed. When you select Display unnamed Groups, the list displays all the unnamed groups.

      When you select an object from a group, the other objects of this group are also selected at the same time. The objects can be members of more than one group, and the group can be nested in other group. You can restore a nested group to the original group configuration by ungrouping it.

      The named groups is not available when you insert a drawing as a external reference or a block. However, it is available if you band and then explode the external reference or explode the block.


A group containing too much objects can degrade performance of system.

To create a group

  1. On the command line, type group.

  2. Under Create New Group, enter the name and description of the group.

  3. Click Selectable if you want all entites in the group to be selected when you select one entity of the group in the drawing.

  4. Click Select entities and Create Group.

  5. Select the objects for the group, and then press Enter.

  6. In the Group dialog box, click OK.


Select Objects in Groups

    You can type a group name to select a group at the prompt of Select entities. If the system variable PICKSTYLE is set to 1 or 3, you can select any objects of the group.

    When you select an object that is a member of more than one groups, all the objects from that groups containing the selected object are selected.


Edit Groups

      You can add or remove group members and rename groups at the Group dialog box. You can also do the operation such as copy, mirror and arrange as well as giving description.

     You can remove members of a group from selecting objects on the drawing by clicking the Remove entities from Group button. If a group member is included in a deleted block, the object is removed from the drawing and also from the group. The group maintains defined even all the group members are removed.


To modify a group and its objects

  1. On the command line, type group.

  2. Select the group you want to modify.

  3. Under Modify Selected Group, do one or more of the following:

  • Enter a new name, and then click Rename Group.

  • Enter a new description, and then click Change Group Description.

  • Select whether you want the group to be selectable in the drawing.

  • Click Add Entities to Group, select the objects to add to the group, and then press Enter.

  • Click Remove Entities from Group, select the objects to remove from the group, and then press Enter.

  1. In the Group dialog box, click OK.


      You can delete group definition by clicking Un-group entities button. The group is also removed from the drawing; however, the group members remain in the drawing.


To ungroup objects

  1. On the command line, type group.

  2. Select the group to delete.

  3. Under Modify Selected Group, click Ungroup Entities.

  4. Click OK.


     Exploding a group deletes it from a drawing; however, objects that were part of the group remain in the drawing.

      The group's member order can be changed (the order in which the objects were selected). There are two ways to reorder group members.

  • Change the serial number of individual members or arranges of group members.

  • Reverse the ranking of all members. The number of first object in each group starts from 0 rather than 1.

To change the order of objects in a group

  1. On the command line, type group.

  2. Under Modify Selected Group, click Reorder Entities.

  3. In the Reorder Grouped Entities dialog box, select the group you want to reorder.

  4. To see the order of objects in the group, click Highlight. Follow the prompts that display to view the objects one by one.

  5. To reverse the order of all objects in the group, click Reverse Order.

  6. To change the order of specific objects or a range of objects:

  • In Remove from Position, enter the current position of the object.

  • In Place to Position, enter the new position of the object.

  • In Number of Objects, enter the number of objects or range of objects to reorder. For example, if you are changing the order of only one object, enter 1.

  • Click Reorder.

NOTE The objects in a group are numbered 0, 1, 2, 3, and so on.

  1. Click OK, and then click OK again.


Commands Reference

GROUP: Creates and manages saved sets of objects called groups

System Variables Reference

PICKSTYLE: Controls the use of group selection and associative hatch selection


 

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