15 Entity Selection
The selection tools documented in this chapter are used to select
entities for later modification. For example if you want to move some
entities, you need to select them before you can do so. The selection tells
QCad which entities you intend to move.
Selected entities are highlighted in the graphic view with red color and a
unique tight dotted line pattern.
Deselecting All
CAD Toolbar:

Menu:
Select - Deselect All
Command:
?
Description:
Deselects all entities on all currently visible layers. Use this tool
to make sure that no entities are selected.
Selecting All
CAD Toolbar:

Menu:
Select - Select All
Command:
?
Description:
Selects all entities on all currently visible layers.
Selecting Single Entities
CAD Toolbar:

Menu:
Select - Select Entity
Command:
?
Description:
Selects single entities.
Procedure:
- Use the mouse to specify the entities to select. If you click an
entity that is already selected it will get deselected.
Selecting Contours
CAD Toolbar:

Menu:
Select - (De-)Select Contour
Command:
?
Description:
Selects or deselects entities that are connected to each other and
form a contour (closed or open).
Procedure:
- Use the mouse to pick one entity of the contour you want to select.
The algorithm then searches from the endpoints of the selected entity in
both directions for entities that are connected to this entity. All
connected entities get selected if the entity you picked was unselected.
Otherwise the whole contour will be deselected.
Window Deselection
CAD Toolbar:

Menu:
Select - Deselect Window
Command:
?
Description:
Deselects all entities that are entirely within a given
window.
Procedure:
- Click the first corner of the window using the left mouse
button.
- Drag the mouse to the other corner.
- Click the second corner of the window.
Window Selection
CAD Toolbar:

Menu:
Select - Select Window
Command:
?
Description:
Selects all entities that are entirely within a given window.
Procedure:
Analog to deselecting entities in a window.
Inverting Selection
CAD Toolbar:

Menu:
Select - Invert Selection
Command:
?
Description:
Selects all unselected entities and deselects all selected
entities.
Deselect Intersected Entities
CAD Toolbar:

Menu:
Select - Deselect Intersected
Command:
?
Description:
Deselects all entities that are intersected by a line.
Procedure:
- Set the startpoint of the line using the left mouse button.
- Drag the mouse to the endpoint of the line.
- Set the endpoint of the line. All entities that are intersected by
the line you've just drawn will be deselected.
Select Intersected Entities
CAD Toolbar:

Menu:
Select - Select Intersected
Command:
?
Description:
Selects all entities that are intersected by a line.
Procedure:
Analog to deselecting intersected entities.
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