Onshape provides the Create selection dialog to make selecting related faces, such as faces that define a pocket on a model, easy. This is especially useful in certain commands, such as Delete face and Replace face. An alternative to Create selection is the Select command through the same context menu:

Accessing Create selection from the part context menu

This command allows you to select a group of like items without having to open the Create selection dialog. You can use the collection of selected items to fill the tool dialog you open next.

For example, with one edge selected in the model below, you can select Select > Parallel edges to automatically select all the edges in parallel:

Create selection example, with one edge of the model selected

Create selection example, selecting parallel edges of the model

Then, when you open the Fillet tool dialog, the selection field is already populated with the selection:

Fillet dialog

To create a selection of connected edges, select an edge, then right-click to open the context menu:

Example of loop/chain connected edges option highlighted in a context menu

From there, click Select > Loop/chain connected edges.

Alternatively, you can use the Create selection command from the same context menu to open the Create selection dialog box:

Example of Loop/chain connected edges option used on a model in the graphics area

Access this from a Feature tool dialog with this icon Create Selection Arrow Icon, or select Create selection from the context menu.

Feature Tool Dialog

Create selection may be used with extrusions, pockets, hole, fillets, tangent connected faces, bounded faces, or edges as the selection criteria. Select one or more faces that the system uses to propagate to select other faces based on the selection criteria. These selections may then be added to a tool dialog value list such as Replace face or Delete face. (See the example below.)

The available selection criteria are:

  • Protrusion - Selects all faces that are connected to the selected face by a convex edge.
  • Pocket - Selects all faces that are connected to the selected face by a concave edge.
  • Hole - Selects all faces that are connected to the selected face as part of the same round hole.
  • Fillets - Selects all faces on a part which form a constant radius fillet.
  • Tangent connected - Select all faces that are connected to the selected face by a tangent edge.
  • Bounded faces - Selects all faces between the selected face and the boundary defined by other edges and faces selected. To start, select a seed face that touches the desired region of faces. Then select all edges or faces which bound the desired region of faces:

    The second selection defines the boundary. All adjacent faces and edges are captured in this selection set to form a closed boundary. If a close boundary cannot be formed, all adjacent faces and edges are selected.

  • Select patterns option - Select all other faces on the part which match the same criteria specified.

Selecting edges enables you to create specific edge selections for detailed filleting or surfacing, for example. The available selection refinement options are:

  • Tangent connected - Selects all edges tangent to the selected edge. (See example below.)
  • Loop/chain connected - Select a face (and/or sketch edges) and all edges that form a connected loop on that face (or adjacent to the sketch edge) are selected. Select adjacent faces (or sketch edges) to continue the loop. Unselect a loop if multiple are selected or keep multiple loops if desired.

    The face highlighted in orange is the selected face. The edges highlighted in yellow are the automatic selections:

    Example of the selection of a face via Loop/Chain Feature

    When you select a face, all edges adjacent to that face forming a loop are automatically selected, as shown above.

    When you select a face and then an edge, all edges adjacent to the selected edge along the selected face forming a loop are automatically selected, as in:

    Example of the selection of a face and edge via Loop/Chain Feature

    The orange face is selected as well as the orange edge. The yellow highlighted edges are automatically selected.

  • Equal length/radius - Select one edge and all the other edges that match that in length or radius are automatically selected:

    Example of selection of edges via Equal Length/Radius Feature

  • Parallel - Selects one edge and all other edges parallel to that edge are selected:

    Example of selection of edges via Parallel Feature

  • Select pattern checkbox - Works with patterns: select one edge and all edges in the pattern are selected automatically. Again, the circle highlighted in orange is the selected edge which is part of a patterned sketch. Onshape automatically selects the rest of the patterned features, highlighted in yellow:

    Example of selection of edges via Select Pattern Feature

Selecting faces

The example below demonstrates using Create selection within the Move face feature, selecting faces:

  1. Click the Move face tool.
  2. Right-click and select Create selection:

    Example of selection within Move Face Feature

  3. Select the type of selection (here, Protrusion), select a face, and Onshape automatically makes the appropriate selections:

    Example of selection within Move Face Feature

  4. Click Add selection to transfer the selected components to the Move face dialog:

    Example of selection within Move Face Feature

  5. Enter the remaining required specifications for the Move face feature.

Selecting edges

The example below demonstrates using Create selection within the Fillet feature, selecting edges:

  1. Click the Fillet tool.
  2. Right-click and select Create selection.

    Example of selection within the Fillet Feature

  3. Select the type of selection (here, Tangent connected), select an edge or edges, and Onshape automatically makes the appropriate additional selections (the original selections are highlighted in orange, the yellow highlights indicate the automatic selections):

    Example of selection within the Fillet Feature

  4. Click Add selection to transfer the selected components to the Fillet dialog:

    Example of selection within the Fillet Feature

  5. Enter the remaining required specifications for the Fillet feature.

Create selection icon

Onshape provides the Create selection dialog to make selecting related faces, such as faces that define a pocket on a model, easy. This is especially useful in certain commands, such as Delete face and Replace face.

  1. Access the Create selection dialog either via a Feature tool dialog with the Create selection icon OR via the Create selection option in the Context Menu.

    Step 1 for creating a selection

    Step 1 for creating a selection

    The Create selection dialog opens:

    Step 1 for creating a selection

  2. Chose the Feature type you will be selecting:
    • Protrusion - Selects all faces that are connected to the selected face by a convex edge.
    • Pocket - Selects all faces that are connected to the selected face by a concave edge.
    • Hole - Selects all faces that are connected to the selected face as part of the same round hole.
    • Fillets - Selects all faces on a part which form a constant radius fillet.
    • Tangent connected - Selects all faces that are connected to the selected face by a tangent edge.
    • Bounded faces - Selects all faces between the selected face and the boundary defined by other edges and faces selected. To start, select a seed face that touches the desired region of faces. Then select all edges or faces which bound the desired region of faces.

      The second selection defines the boundary. All adjacent faces and edges are captured in this selection set to form a closed boundary. If a close boundary cannot be formed, all adjacent faces and edges are selected.

  3. Select entities in the Part Studio.
  4. Toggle Select patterns on or off.
  5. Tap Add selection to create the selection per the specifications you set in the dialog.

The example below demonstrates using Create selection within the Delete face feature.

  1. With the Delete face tool selected and the dialog open, select the Create selection icon:

    Step 1 for using Delete face feature

    The Create selection dialog opens:

    Step 1 for using Delete face feature

  2. Select the type of feature you want to edit, in this case, a pocket:
  3. Select a face of the pocket you want to edit:

    Step 3 for using Delete face feature

    Because you specified that you were creating a selection from a pocket, the other faces that make up the pocket are automatically selected for you:

    Step 3 for using Delete face feature

  4. Tap Add selection to add the selection of the faces of this pocket as one selection for the Delete face tool to use.

    The Create selection dialog clears to allow you to create another selection.

  5. Tap the left facing chevron in the upper left of the dialog to return to the Delete face dialog.

    Note that Delete face now has entities selected:

  6. Accept the Delete face dialog.

    Your selected faces are deleted:

    Step 6 for using Delete face feature