Advanced

The select menu in edit mode contains additional tool for selecting components:

Sharp Edges
This tool selects all edges between two faces forming an angle greater than the angle value, Where an increasing angle selects sharper edges.
Linked Flat Faces Shift-Ctrl-Alt-F
Select connected faces based on a threshold of the angle between them. This is useful for selecting faces that are planar.
Mirror
Select mesh items at the mirrored location across the chosen axis.
Side of Active
Selects all vertices on the mesh in a single axis relative to the active vertex. In Vertex selection mode only.
Linked
Selects all components that are connected to the current selection (see Select Linked).

Checker Deselect

Reference

Mode:Edit Mode
Menu:Select ‣ Checker Deselect

This tool applies an alternating selected/deselected checker pattern. This only works if you already have more than one mesh element selected.

Changes the current selection so that only every Nth elements (vertices, edges or faces, depending on the active selection mode) will remain selected, starting from the active one.

In case of islands of selected elements, this tool will affect only the island of the active element (if there is one), or the island of the first element in the order of internal storage (if there is no active element).

Nth Selection
Skip every Nth element leaving it selected.
Skip
Number of consecutive elements to skip (keep selected) at once.
Offset
Offset from the starting point.

Select All by Traits

Non Manifold Shift-Ctrl-Alt-M

Selects the non-manifold geometry of a mesh. This entry is available when editing a mesh, in Vertex and Edge selection modes only. The Operator panel provides several selection options:

Extend
Lets you extend the current selection.
Wire
Selects all the edges that do not belong to any face.
Boundaries
Selects edges in boundaries and holes.
Multiple Faces
Selects edges that belong to three or more faces.
Non Contiguous
Selects edges that belong to exactly two faces with opposite normals.
Vertices
Selects vertices that belong to wire and multiple face edges, isolated vertices, and vertices that belong to non-adjoining faces.
Interior Faces
Selects faces where all edges have more than two faces.
Select Faces by Sides
Selects all faces that have a specified number of edges.
Loose Geometry
Selects all vertices or edges that do not form part of a face.
Ungrouped Vertices
Selects all vertices which are not part of a vertex group.

Select Linked

Reference

Mode:Edit Mode
Menu:Select ‣ Linked
Hotkey:Ctrl-L

Select geometry connected to already selected elements. This is often useful when a mesh has disconnected, overlapping parts, where isolating it any other way would be tedious.

To give more control, you can also enable delimiters in the Operator panel, so the selection is constrained by seams, sharp edges, materials or UV islands.

With Pick Linked you can also select connected geometry directly under the cursor, using the L shortcut to select or Shift-L to deselect linked.

This works differently in that it uses the geometry under the cursor instead of the existing selection.

Select Similar

Reference

Mode:Edit Mode
Menu:Select ‣ Similar…
Hotkey:Shift-G

Select geometry that has similar certain properties to the ones selected, based on a threshold that can be set in tool properties after activating the tool. Tool options change depending on the selection mode:

Vertex Selection Mode:
Normal
Selects all vertices that have normals pointing in similar directions to those currently selected.
Amount of Adjacent Faces
Selects all vertices that have the same number of faces connected to them.
Vertex Groups
Selects all vertices in the same vertex group.
Amount of Connecting Edges
Selects all vertices that have the same number of edges connected to them.
Face Regions
Select matching features on a mesh that has multiple similar areas based on the topology.
Edge Selection Mode:
Length
Selects all edges that have a similar length as those already selected.
Direction
Selects all edges that have a similar direction (angle) as those already selected.
Amount of Faces Around an Edge
Selects all edges that belong to the same number of faces.
Face Angles
Selects all edges that are between two faces forming a similar angle, as with those already selected.
Crease
Selects all edges that have a similar Crease value as those already selected.
Bevel
Selects all edges that have the same Bevel Weight as those already selected.
Seam
Selects all edges that have the same Seam state as those already selected. Seam is a true/false setting used in UV texturing.
Sharpness
Selects all edges that have the same Sharp state as those already selected. Sharp is a true/false setting (a flag) used by the Edge Split Modifier.
Face Selection Mode:
Material
Selects all faces that use the same material as those already selected.
Image
Selects all faces that use the same UV texture as those already selected (see UV texturing pages).
Area
Selects all faces that have a similar area as those already selected.
Polygon Sides
Selects all faces that have the same number of edges.
Perimeter
Selects all faces that have a similar perimeter (added values of its edge lengths).
Normal
Selects all faces that have a similar normal as those selected. This is a way to select faces that have the same orientation (angle).
Co-planar
Selects all faces that are (nearly) in the same plane as those selected.

More/Less

More Ctrl-NumpadPlus
Expands the selection to the adjacent elements of the selection type.
Less Ctrl-NumpadMinus
Contracts the selection from the adjacent elements of the selection type.
Next Active Shift-Ctrl-NumpadPlus
This uses selection history to select the next vertex/edge/face based on surrounding topology.
Previous Active Shift-Ctrl-NumpadMinus
Select previous just removes the last selected element.

Select Loops

You can easily select loops of components:

Edge Loops

Reference

Mode:Edit Mode –> Vertex or Edge select mode
Menu:Select ‣ Edge Loop
Hotkey:Alt-RMB

Holding Alt while selecting an edge selects a loop of edges that are connected in a line end-to-end, passing through the edge under the mouse pointer. Holding Shift-Alt while clicking adds to the current selection.

Edge loops can also be selected based on an existing edge selection, using either Select ‣ Edge Loop, or the Edge Loop Select option of the Edge Specials menu Ctrl-E.

Bemerkung

Vertex mode

In Vertex select mode, you can also select edge loops, by using the same hotkeys, and clicking on the edges (not on the vertices).

../../../_images/modeling_meshes_selecting_advanced_edge-loops.png

Longitudinal and latitudinal edge loops.

The left sphere shows an edge that was selected longitudinally. Notice how the loop is open. This is because the algorithm hit the vertices at the poles and terminated because the vertices at the pole connect to more than four edges. However, the right sphere shows an edge that was selected latitudinally and has formed a closed loop. This is because the algorithm hit the first edge that it started with.

Face Loops

Reference

Mode:Edit Mode –> Face or Vertex select modes
Hotkey:Alt-RMB

In face select mode, holding Alt while selecting an edge selects a loop of faces that are connected in a line end-to-end, along their opposite edges.

In vertex select mode, the same can be accomplished by using Ctrl-Alt to select an edge, which selects the face loop implicitly.

../../../_images/modeling_meshes_selecting_advanced_face-loops.png

Face loop selection.

This face loop was selected by clicking with Alt-RMB on an edge, in face select mode. The loop extends perpendicular from the edge that was selected.

../../../_images/modeling_meshes_selecting_advanced_face-loops-vertex.png

Alt versus Ctrl-Alt in vertex select mode.

A face loop can also be selected in Vertex select mode. Technically Ctrl-Alt-RMB will select an Edge Ring, however, in Vertex select mode, selecting an Edge Ring implicitly selects a Face Loop since selecting opposite edges of a face implicitly selects the entire face.

Edge Boundary

Reference

Mode:Edit Mode –> Vertex or Edge select modes
Hotkey:Alt-RMB

Loop selection on edge boundaries. To extend the selection to all boundaries if the current boundary is already selected use Alt-RMB again.

Edge Ring

Reference

Mode:Edit Mode
Menu:Select ‣ Edge Ring
Hotkey:Ctrl-Alt-RMB

In Edge select mode, holding Ctrl-Alt while selecting an edge (or two vertices) selects a sequence of edges that are not connected, but on opposite sides to each other continuing along a face loop.

As with edge loops, you can also select edge rings based on current selection, using either Select ‣ Edge Ring, or the Edge Ring Select option of the Edge Specials menu Ctrl-E.

Bemerkung

Vertex mode

In Vertex select mode, you can use the same hotkeys when clicking on the edges (not on the vertices), but this will directly select the corresponding face loop…

../../../_images/modeling_meshes_selecting_advanced_edge-ring.png

A selected edge loop, and a selected edge ring.

In Fig. A selected edge loop, and a selected edge ring. the same edge was clicked on, but two different „groups of edges“ were selected, based on the different tools. One is based on edges during computation and the other is based on faces.

Shortest Path

Reference

Mode:Edit Mode
Menu:Select ‣ Shortest Path
Hotkey:Ctrl-RMB
../../../_images/modeling_meshes_selecting_advanced_shortest-path.png

Select a face or vertex path with Ctrl-RMB.

Selects all geometry along the shortest path from the active vertex/edge/face to the one which was selected.

Face Stepping
Supports diagonal paths for vertices and faces, and selects edge rings with edges.
Topological Distance
Which only takes into account the number of edges of the path and not the length of the edges to calculate the distances.
Fill Region Shift-Ctrl-RMB
Selects all elements in the shortest paths from the active selection to the clicked area.
Checker Select Options

Allows to quickly select alternate elements in a path.

Nth Selection
Skip every Nth element, leave unselected.
Skip
Number of consecutive elements to skip at once.
Offset
Offset from the starting point.

Loop Inner-Region

Reference

Mode:Edit Mode –> Edge select mode
Menu:Select ‣ Select Loop Inner-Region

Select Loop Inner-Region selects all faces that are inside a closed loop of edges. While it is possible to use this operator in Vertex and Face selection modes, results may be unexpected. Note that if the selected loop of edges is not closed, then all connected edges on the mesh will be considered inside the loop.

../../../_images/modeling_meshes_selecting_advanced_inner-region1.png

Loop to Region.

../../../_images/modeling_meshes_selecting_advanced_inner-region2.png

This tool handles multiple loops fine, as you can see.

../../../_images/modeling_meshes_selecting_advanced_inner-region3.png

This tool handles „holes“ just fine as well.

Boundary Loop

Reference

Mode:Edit Mode –> Edge select mode
Menu:Select ‣ Select Boundary Loop

Select Boundary Loop does the opposite of Select Loop Inner-Region, based on all regions currently selected, it selects only the edges at the border(contour) of these islands. It can operate in any select mode, but when in Face mode it will switch to Edge select mode after running.

All this is much more simple to illustrate with examples:

../../../_images/modeling_meshes_selecting_advanced_boundary-loop.png

Select Boundary Loop does the opposite and forces into Edge Select Mode.