When you select objects with the Select tool (Q), you identify the objects to which you want to apply an action or operation.
- You can select objects in the Viewport, Scene Editor, or Select menu. When selecting objects in the viewport, they get highlighted in the Scene Editor as well and vice versa.
- Selected objects are highlighted light blue/light gray.
- Objects that are part of a layer that is locked or set as invisible are not selectable.
- Activating Isolation mode ( I ) and altering scene object type visibility (viewport menu) do not affect the current selection.
- Map layers can be selected in the Scene Editor only.
To create a rectangular selection, click the Select button (Q) to open the Selection tool in the Tool Options window . You can also click Select > Selection Tool in the main menu.
Drag the selection box over the objects to select. Release the mouse button to finalize the selection.
To create a lasso selection, click the Select button (Q) and click the Lasso Selection tool in the Tool Options window . You can also click Select > Lasso Selection Tool in the main menu.
Click and hold the mouse button and drag the mouse following the boundary of the area you want to select to create a precise custom selection. Release the mouse button to finalize the selection.
The Selection Tool includes the following options:
Press and hold the modifiers in the parentheses to change the mode.
Hides the selection highlighting while the object remains selected. This is useful when modifying CGA attributes in the Inspector.
See the Selection sets section below.
You can add, update, or edit selection sets for later use. To add or update a selection set, do the following:
- Select the shapes to add or update a selection set.
- Click the Add / Update Selection Set button under Selection Sets in the Selection Tool options. You can also click Select > Add / Update Selection Set in the main menu.
- To add or update an existing selection set, do one of the following:
- Click Add to add and save the selection set.
- Select an existing selection set in the list and click Update to update the selection.
- Click Cancel to close the window without adding or updating selections sets.
To apply a saved selection set to shapes, do the following:
- Click the Choose... drop-down menu under Selection Sets in the Selection Tool options. You can also click Select > Apply Selection Set in the main menu.
- Click a saved selection set in the list.
The selection is applied to the shapes.
You can rename, reorder, or remove an existing selection set by doing one of the following:
- Click Edit Selection Sets... under Selection Sets in the Selection Tool options.
- Click Select > Edit Selection Sets... in the main menu.
- Selection sets use an internal identifier to reference the selected objects. Therefore, previously created selection sets do not break when you rename objects.
- When deleting a selection set, the objects within don't get deleted.
- When loading a selection set, objects that have been deleted in the meantime are ignored.
Select in Viewport
The Select tool (Q) offers different methods to select objects:
Selects an individual object. On an already selected object, components are selected (faces, edges, or vertices).
Selects and frames an individual object.
Left-to-right selection rectangle
Selects objects or components that are fully inside the selection rectangle. Map layers are not added to the selection.
Right-to-left selection rectangle
Selects objects that intersect with the selection rectangle. Map layers are not added to the selection. *
* This option isn't available with the Lasso Selection tool.
The selection methods can be combined with modifiers:
Add to existing selection.
Deselects a selected object or adds an unselected object to a selection.
Remove objects from an existing selection. Unselected objects are not added to the selection. This feature is especially handy when selecting using a selection box.
Select in Scene Editor
The following options are available to perform selections in the Scene Editor:
Add to selection, in lists: add adjacent objects.
Deselects a selected object or adds an unselected object to the selection.
Select main menu
Select All, Deselect All, Invert Selection
Select Objects in Same Layer
All objects in the same layer or layers are selected.
Select Objects by Map Layer
See Selection with image maps for details.
Select Objects in Same Layer Group
All objects in the same layer group or groups are selected.
Select Objects of Same Type
Selects all objects with the same type or types as the current selection.
Select Objects of Same Group
Selects all objects belonging to the same group as the objects in the source selection. For example, if the source selection contains a block, the resulting selection will contain the block and the block's shapes.
Select Objects with Same Rule File
Selects all objects having assigned a rule file that is present in the source selection.
Select Objects with Same Start Rule
Selects all objects having a start rule that is present in the source selection.
Select Continuous Graph Objects
This method can be used to select graph segments that are continuous, for example, if they together define one street. The search for continued segments starts at the source selection.
Multi selections and lead selection
When you create multi selections, the highlighted color of the "lead selection" object varies from the color of the other selected objects. This is because the lead selection is used for operations where additional information is needed. For example, the subtract tool uses the lead selection to determine whether object A shall be subtracted from B or B from A.
- Typically, the last object selected becomes the lead selection.
- The lead selection is marked with a slightly brighter selection color.
- To change the lead selection in an existing selection, use Shift+click in the Viewport.
When working with large scenes, it is often useful to hide objects temporarily to declutter the scene. Open the Visibility settings and click Isolate Selection or press I in the Viewport.
- Select the object to isolate.
- Click Isolate Selection (I) to remove all other models in the scene.
Modify the isolated objects. You can also change the selection.
- Click Isolate Selection (I) again to reveal all (according to visibility settings in the Scene Editor) models in the scene.