separating the model by group by a hidden method
1 Drag out the model in the workspace, press "T" after creating the object, or activate the Edit button to enter editing mode. Shift+ctrl+alt box Select the section that you want to group, the box selection is displayed in red, which is the hidden part (or you can press the Shift+ctrl box to display the section in green). Of course, this can be reversed by the selection of hidden to change which part of the display, which part of the hidden, the inverse of the hidden shortcuts: Press and hold the Shift+ctrl left mouse button in the work area drag-and-drop.
2 in the tool toolbar to open the Polygroups interface, click on the Groupvisile, the visible model into a group.
3 Press and hold Shift+ctrl in the blank spot, the model all show up. This makes it a success to divide a model into two groups as needed.
To separate the model by group by the Mask method
1 Drag out the model in the workspace, press "T" after creating the object, or activate the Edit button to enter editing mode. CTRL + the left mouse button to mask the portion that needs to be grouped.
2 in the Tool toolbar, open the Polygroups interface, click the Group Masked button, grouped by the mask.
There are two ways to delete a group:
① Open the split interface under the Subtool toolbar and click Groups Split to separate the model. Click "OK" in the pop-up dialog box, display two models in the Subtool panel, finally switch to the layer where the model needs to be deleted, press the Delete button, and the layer model will be deleted directly. Screenshot experience is as follows.
Note: Groups Split and delete Subtool can not be undone, history will be deleted all, not through Ctrl + Z back to the state has not been deleted. So be sure to back it up first.
② Direct Shift+ctrl+alt box to remove the face, this operation is just to remove the face you want to hide, and there is no real deletion. Activate the tool>geometry>modify topology column, and then click del Hidden (Remove hidden surface). Screenshot experience is as follows.