From OpenSCADAWiki
If the dialog is called for the group of selected figures (Fig.5.5.b), properties (attributes) listed in the dialog will be applied to all figures listed in the title of the dialog. When you call the dialog, in the fields of the properties will be shown the data of the figure from the group of selected ones, for which it was called the popup menu. There is the possibility to include/exclude certain properties of the dialog. For this the (
) button is provided. In the case of exclusion of individual properties, they will not be processed upon acceptation of the dialog ("Ok" button). After the acceptation of the dialog, all of the data of the enabled properties will be applied to the whole group of figures.