The ‘Crop’ function allows the piece to be cut using the reference, the side, a perpendicular line or a custom line.
The interface for this function is similar to the following image:

Parameters

To use this working, first select one of the three available modes by pressing the corresponding button:

	Parallel cut When this mode is selected, the dividing cut will be made along the longitudinal axis of the selected side.
	Orthogonal cut When this mode is selected, the dividing cut will be made obliquely relative to the selected side, with its origin at the centre of that side.
	Cut through two points When this mode is selected, the dividing cut is defined by manually specifying the coordinates of the two end points that determine the separation line between the pieces.

Parameters for ‘Parallel cut’ and ‘Orthogonal cut’

For the next two buttons below, this function can be enabled or disabled by clicking the checkbox to the right of the ‘Cut extension’ label.

Parameters for ‘Cut through two points’

The next button can be used to define the coordinates of the two points that make up the dividing line.

Setting division line point parameters	When the function is enabled, four parameter fields become available in which the operator can specify the coordinates (X, Y) of the start and end points of the cutting line.
	Cut orientation By pressing the dedicated control, the user can select the orientation of the cut—horizontal, vertical or free—relative to the starting point of the previously set line.
	Vertex snapping When free cut is selected in the previous parameter, an additional parameter is displayed to its right. When enabled, it makes it easier to snap to the vertices of the figure when defining the cutting-line points.

Executing the working

Parallel cut

The following image shows a parallel cut made on the piece already shown on the chapter cover:

Orthogonal cut

The following image shows an orthogonal cut made on the piece already shown on the chapter cover:

Cut through two points

The following image shows a cut through two points made using the vertex snapping function on the piece already shown on the chapter cover:

The following image shows a cut through two points made without using any special function on the piece already shown on the chapter cover:

Splitting pieces

When one or more pieces have been associated with the selected piece through Crop workings, a specific button for managing the associated pieces appears at the top of the “Edit Piece” panel.

	Split pieces Button used to separate the split pieces from the original piece.

Before splitting, the associated pieces are managed as a single unit within the work area. In this state, a block consisting of multiple elements is created; these elements undergo the same operations and have not yet been separated.

For example, when one of the pieces generated through crop is added to the work area from the pieces list, all other associated elements are automatically inserted as well.

When the Split Pieces button is pressed, each piece generated through crop is dissociated from the original piece and treated as an independent element.

Subsequently, both the list of associated pieces previously visible above the preview in the Edit Piece panel and the button for splitting the pieces disappear from the interface.