...
Enter the name of the style at the top of the palette.
In the middle section, use the browser to locate the image file you want to use. A preview of the image appears in the lower section. The size of the repeating image is controlled by the Width and Height values. You can change these values manually, or click Advanced for more control. 
When you click Advanced, the following window appears. In
the left window, use the dotted border to set the section of the image that will repeat. The tiled pattern updates dynamically under Pattern Preview. You can also set the border by entering values for Left, Top, Width, and Height.
Smooth edges up to n pixels: Smooths the transition between bitmap repetitions by blending adjacent edges.
Output bit depth: The number of bit used for the bitmap.
Calculate adaptive palette: Forces the color down-sampling to match the original color palette as closely as possible. Available only if the Output bit depth is lower than the value which the original bitmap used.
When the style is defined, click Update Style to use it in the current drawing, or Add to Defaults to be able to use it in future drawings.
Now when you open the Properties (see Properties Window) for a 2D closed object, the bitmap style appears in the Brush page (see Properties Window). The style also can be used in the Hatching tools (see Hatching)
Gradient Patterns
Enter the name of the style at the top of the palette.
There are four types of gradient fills: Linear, Radial, Reflected, Diamond, and Custom. Each type is explained later in this section.
Mode (called Fit Mode in the Brush Properties):
Exact Fit: The gradient completely fills the object itself. In this example, the fill completely reaches the second gradient color at the boundary of the circle.
Fit to Extents: The gradient completely fills the extents rectangle that encloses the object. In this example, the second gradient color is only reached at the boundary of the extents rectangle, which is larger than the circle itself. This is why the color at the circle boundary is lighter than in the example above. 
Center Point:
Modes: Select Extents center to center the fill at the center of the object's extents rectangle. Reference point centers the fill at the object's reference point (see Components of Select Edit Mode).
Focus Scale: This must be a value between 0 and 1. Zero means the color interpolation start from the center (left image below). A value of 0.5 will start the interpolation halfway between the center and the edge (right image below).
...
Note: Settings for Fit Mode, Center Point, and Focus Scale are set here as the fill defaults. These values can be overridden for filled objects by modifying the object's Brush Properties (see Properties Window).
Linear Gradient
Linear fill moves from one color to the other along a straight vector. Under Control Points, highlight First and set the Color. Do the same for Second.
By default, the First color runs vertically along the left side and changes to the Second color along a left-to-right vector. To change this vector, click the icon with the three dots.
Define the new vector on the screen. The first point of the vector controls where the First color appears. 
Radial Gradient
Radial fill moves from one color to the other along a radial path. Under Control Points, highlight Center and set the center color. Highlight Radius and set the outer color.
Set the radius manually, or click the 3-dots icon and set the radius on-screen.
Reflected Gradient
Reflected fill consists of one line of reflected color, fading to another color on either side. moves from one color to the other along a radial path. Under Control Points, highlight First and set the reflective color. Highlight Second and set the fade color.
Set the angle of the reflection line manually, or click the 3-dots icon and set the direction on-screen. 
Diamond Gradient
Diamond fill moves from from the center outward in four directions, each separated by 90 degrees. Under Control Points, highlight Center and set the color of the center and linear patterns. Highlight Radius-Vector and set that appears in between the Center color lines.
By default, the Center color runs vertically and horizontally to either side. To change this vector, click the icon with the three dots. 
Define Define the new vector on the screen. The first point of the vector controls where the Center color appears. The second point of the vector controls the angle of the four lines.
Custom Gradient
Use this type to create a custom polyline and apply colors to each polyline point. The results will resemble a Diamond Gradient, but can have numerous points, each with its own color.
Color 1 runs from the center outward to each point. By default there are three other points (triangular polyline). To change the polyline, click the icon with the three dots.
\
Define the polyline on the screen, proceeding in the order of Color 2, Color 3, and so on. The polyline automatically closes, and cannot intersect itself. Select Finish from the local menu to complete the polyline. You can also select an existing polyline from the drawing; click the arrow icon in the Inspector Bar to do this.
If the polyline has more than three points, the number of Control Points increases, and you can set a color for each point. 
When When the style is defined, click Update Style to use it in the current drawing, or Add to Defaults to be able to use it in future drawings.