# Extruded Surface

Stretch sketches, curves, edges, and so on a certain distance in a specified direction to extend the curve into a surface.

Click to enter the Extrude Surface command, the interface of which is shown in the following figure.

The functions of each control are as follows:

Outline： Select the outline that needs to be stretched, which can be a sketch, a sketch line, or a polygon.

Note：

If the profile selects the entire sketch, the sketch can contain only one open or closed loop;
If the sketch can contain multiple closed or open loops, select one of the lines or a continuous set of chains when selecting the profile.

Offset： Starts the stretch from a plane or its opposite plane that is some distance from the current sketch plane. Check to enter an offset distance.
Direction： After checking, you can customize the stretch direction, pick a straight line or two points, and the stretch direction defaults to sketch normal when not checked.

Note：

When the extrusion profile is a polygon, the extrusion direction must be defined.

Method： There are three ways, different ways correspond to different parameters, you can preview different stretching effects. The methods are "given depth", "form to surface", and "symmetry on both sides".
Reverse： The stretch direction is positive and negative, and the stretch direction is opposite to the default direction after checking.
Draft： Cone the extruded surface. You can enter parameters directly, or you can drag and drop Handle to adjust the draft angle.
Back Cover： If the stretched profile is a closed profile, after checking the back cover, a plane is automatically generated at the end of the stretch.
Direction 2： After checking, use the sketch plane as the datum to stretch in two directions at the same time, and select different ways to correspond to different parameters and directions 1 way combination, preview the corresponding stretch effect. The methods are "given depth" and "form to surface".

Depth: In millimeters, stretched in a positive direction from the sketch plane, adjust the depth of the stretch by entering parameters or dragging the stretch direction arrow.
Reverse: After clicking, the stretch direction is changed from positive to reverse.
Draft: After ticking the draft, preview the draft effect of the default angle, and adjust the draft angle by entering parameters or dragging the angle direction arrow.
Back Cover: When the back cover is checked, the closed profile automatically forms a plane at the end of the stretch.

Example： The stretch effect for a given depth is shown in the following illustration.

# Up To Surface

Faces: Pick a solid face, an infinite plane, a surface that contains a stretched outline entirely.
Drawing: The surface is drawn according to the drawing Angle.
Reverse: After checking, the stretch direction is changed from positive direction to reverse direction stretch.
Back Cover: When back cover is checked, the closed profile automatically generates a plane at the end of the stretch.

Example： The shape-to-face down stretch effect is shown in the following illustration.

1.Depth: Draw symmetrically in both directions based on the sketch datum, depth can be adjusted by entering values or dragging arrows.

2.Drawing: drawing the drawn surface according to the drawing Angle.

3.Back cover: When checked, the closed contour automatically generates a flat surface at the end of the drawing position.

Example： The effect of bilateral symmetric drawing is shown in the image below.

Check and draw symmetrically in both directions using the sketch datum as a reference.
The extrusion method has a given depth, is formed to a polygon, and operates in the same way as above.

Example： Shape to Polygon & Give Depth Stretch effect as shown in the following illustration.