# The Boundary Pattern Fill Dialog Box
[GstarCAD 2021](Help%20System/GSTARCAD/2021/Index.md) → [Commands](Help%20System/GSTARCAD/2021/Commands/(Commands).md) → [03 Dialog Boxes](Help%20System/GSTARCAD/2021/Commands/03%20Dialog%20Boxes/(Dialog%20Boxes).md)
There are two option tabs on the left of the dialog box: Hatch and Gradient. Several operation buttons and other options are supplied on the right of the dialog box.
Click the button "\>\>" in the lower right corner of the dialog box, the dialog box will extend to the right. Island detection and other advanced options will display.
**Relative Glossary:**
**Hatch Tab:**
Define the appearance of the hatch pattern to be used.
> **Type and Pattern:**
> Specify the type, pattern, color and background color of the hatch.The instance will display the preview appearance of current selected pattern after selected the type.
> **Angle and Scale:** Specify an angle and a scale for the selected hatch pattern.
> **Hatch Origin:**
> Control the starting position of hatch pattern generation. Some hatches, such as brick patterns, need to be aligned with a point on the hatch boundary. All hatch origins correspond to the current UCS origin by default.
**Gradient Tab:** Define the appearance of the gradient fill to be used.
> **One Color:**
> Specify a fill that uses a smooth transition between darker shades and lighter tints of one color. When One Color is selected, HATCH displays a color swatch with Browse button and a Shade and Tint slider.
> **Two Colors:**
> Specify a fill that uses a smooth transition between two colors. When Two Colors is selected, HATCH displays a color swatch with a Browse button for color 1 and for color 2\. **Gradient Patterns:**
> Display 9 fixed patterns for gradient fills.
> **Orientation:** Specify the angle of the gradient and whether it is symmetrical.
Operation Buttons:
> **Pick Points:**
> Determine a boundary from existing objects that form an enclosed area around the specified point. The dialog box closes temporarily, and you are prompted to pick a point.
> **Select Objects:** Determine a boundary from selected objects that form an enclosed area. The dialog box closes temporarily, and you are prompted to select objects.
> **Remove Boundaries:** Remove from the boundary definition any of the objects added previously.
> **Recreate Boundary:** Create a polyline or region around the selected hatch or fill, and optionally associates the hatch object with it.
> **View Selections:** Temporarily close the dialog box and display the currently defined boundaries with the current hatch or fill settings. This option is not available when no boundary has been defined.
**Options:** Control several commonly used hatch or fill options.
> **Associative:** Control whether the hatch or fill is associative or not. An associative hatch or fill will be updated when the boundaries are modified. **Create Separate Hatches:** Control whether a single hatch object or multiple hatch objects are created when several separate closed boundaries are specified. **Draw Order:** Assign the draw order to a hatch or fill. You can place a hatch or fill behind or in front of all other objects, behind or in front of the hatch boundary.
**Advanced Options:** Display the Island detection and other boundary modifying options.
**Preview:**
Temporarily close the dialog box and display the currently defined boundaries with the current hatch or fill settings. Click in the drawing or press ESC to return to the dialog box. Right-click or press ENTER to accept the hatch or fill.
## Other versions with matching text
[GstarCAD 2016](../../../2016/Commands/03%20Dialog%20Boxes/The%20Boundary%20Pattern%20Fill%20Dialog%20Box--67266f50ee80.md) · [GstarCAD 2017](../../../2017/Commands/03%20Dialog%20Boxes/The%20Boundary%20Pattern%20Fill%20Dialog%20Box--67266f50ee80.md) · [GstarCAD 2018](../../../2018/Commands/03%20Dialog%20Boxes/The%20Boundary%20Pattern%20Fill%20Dialog%20Box--67266f50ee80.md) · [GstarCAD 2019](Help%20System/GSTARCAD/2019/Commands/03%20Dialog%20Boxes/The%20Boundary%20Pattern%20Fill%20Dialog%20Box--67266f50ee80.md) · [GstarCAD 2020](Help%20System/GSTARCAD/2020/Commands/03%20Dialog%20Boxes/The%20Boundary%20Pattern%20Fill%20Dialog%20Box--67266f50ee80.md)