Collection of ART marks united into a group. This class provides methods and properties general for the entire group.
| IG_ARTX_group_bring_to_front | Moves a group of marks to the top of the Z-Order. |
| IG_ARTX_group_clipboard_copy | Copies a group of marks to the clipboard. |
| IG_ARTX_group_clipboard_cut | Cuts a group of marks to the clipboard. |
| IG_ARTX_group_mark_add | Adds specified mark to the group. |
| IG_ARTX_group_mark_at | Gives the index to the specified mark within the group. |
| IG_ARTX_group_mark_count | Provides the count of the marks in the group. |
| IG_ARTX_group_mark_remove | Removes specified mark from the group. |
| IG_ARTX_group_mark_remove_at | Removes the mark specified by index from the group. |
| IG_ARTX_group_marks_remove | Removes the group of marks. |
| IG_ARTX_group_marks_select | Selects the group of marks. |
| IG_ARTX_group_send_to_back | Moves the group of marks to the bottom of the Z-Order. |