QCad User Reference Manual

# 27. 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.

## 27.1. Deselecting All

CAD Toolbar:

Menu:

    Select - Deselect All

Hotkey:

    Ctrl-K

Command:

    deselectall

Description:

Deselects all entities on all currently visible layers. Use this tool to make sure that no entities are selected.

## 27.2. Selecting All

CAD Toolbar:

Menu:

    Select - Select All

Hotkey:

    Ctrl-A

Command:

    selectall

Description:

Selects all entities on all currently visible layers.

## 27.3. Selecting Single Entities

CAD Toolbar:

Menu:

    Select - Select Entity

Command:

    selectsingle

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.

## 27.4. Selecting Contours

CAD Toolbar:

Menu:

    Select - (De-)Select Contour

Command:

    selectcontour

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.

## 27.5. Window Deselection

CAD Toolbar:

Menu:

    Select - Deselect Window

Command:

    deselectwindow

Description:

Deselects all entities that are entirely within a given window.

Procedure:

1. Click the first corner of the window using the left mouse button.
2. Drag the mouse to the other corner.
3. Click the second corner of the window.

## 27.6. Window Selection

CAD Toolbar:

Menu:

    Select - Select Window

Command:

    selectwindow

Description:

Selects all entities that are entirely within a given window.

Procedure:

Analog to deselecting entities in a window.

## 27.7. Inverting Selection

CAD Toolbar:

Menu:

    Select - Invert Selection

Command:

    selectinvert

Description:

Selects all unselected entities and deselects all selected entities.

## 27.8. Deselect Intersected Entities

CAD Toolbar:

Menu:

    Select - Deselect Intersected

Command:

    deselectintersected

Description:

Deselects all entities that are intersected by a line.

Procedure:

1. Set the startpoint of the line using the left mouse button.
2. Drag the mouse to the endpoint of the line.
3. Set the endpoint of the line. All entities that are intersected by the line you've just drawn will be deselected.

## 27.9. Select Intersected Entities

CAD Toolbar:

Menu:

    Select - Select Intersected

Command:

    selectintersected

Description:

Selects all entities that are intersected by a line.

Procedure:

Analog to deselecting intersected entities.

## 27.10. Selecting Layers

CAD Toolbar:

Menu:

    Select - (De-)Select Layer

Command:

    selectlayer

Description:

Selects or deselects all entities on a layer.

Procedure:

- Use the mouse to pick one entity of the layer you want to (de-)select. All entities that are on the same layer as the entity you have picked get selected if the entity you picked was unselected. Otherwise the whole layer will be deselected.