By default, the Left property is empty, which indicates the value of 0 ( left side of the layer ). The Left property is 0, if the expression is missing or invalid.

For instance:

• "-15", 15 pixels to the left side of the layer
• "width / 2" indicates the half of the layer's width or the x-center of the layer
• "width", indicates the width of the layer or right side of the layer
• "value / 100 * width", indicates the Value percent of width of the layer, so if clip's Value percent is 25, the "value / 100 * width" expression gets a quarter of the width of the layer, or 50 gets half of it, and so on.

This property supports the following keywords:

• value keyword specifies the clip's value pointed by the clip's Value property
• width or lwidth keywords, indicates the width in pixels of the layer
• height or lheight keywords, indicates the height in pixels of the layer

Also, this property supports all constants, operators and functions defined here.

The following screen shot shows properties of the clipping objects relative to the layer:

To define a picture clip region over the layer you can use any of the following properties:

• Name, Indicates the picture to be used as a mask/clip.
• DisplayAs, Retrieves or sets a value that indicates the way how the graphic is arranged on the mask/clip.
• AlphaFrom, Gets or sets a value that specifies the alpha-byte to start clipping the picture from.
• AlphaTo, Gets or sets a value that specifies the alpha-byte to end clipping the picture to.

To specify the position / size of the picture clip object you can use any of the following properties:

• Left, Specifies the left position / expression of the clip, relative to the layer.
• Top, Specifies the top position / expression of the clip, relative to the layer.
• Width, Specifies the width value / expression of the clip, relative to the layer.
• Height, Specifies the height value / expression of the clip, relative to the layer.

To move the clipping region you can use any of the following properties:

• OffsetX, Specifies the x-offset expression / value of the clip, relative to the layer.
• OffsetY, Specifies the y-offset expression / value of the clip, relative to the layer.

If none of these properties are calling no clipping is applied to layer.

The InverseClip property inverses the current clipping region, so anything that was included in the clipping region will be excluded, and reverse.