Anchor Nodes

The color spectrum is defined by anchor nodes at user-defined points along a color spectrum in the Colormap dialog. Colors are automatically blended between adjacent anchors.

Anchor nodes are represented by a slider button below the color spectrum. A node with a colored arrow and an orange boundary indicates the node is currently selected.

Anchor Node Value

The data value for the node is displayed in the Value box. Except for the first and last nodes, any node can be assigned to a specific value by typing a new number into the Value box.

Initially, the minimum grid value and the maximum grid value anchor node colors are defined as black and white, respectively. You can change either of the colors by clicking once on the anchor slider button and then clicking on any color in the color palette. The color spectrum is updated to show the change.

Add Anchor Node

You can add additional anchor nodes at any position along the color spectrum. To create a new anchor node, left-click below or on the color spectrum where you want the new node added. The new anchor is automatically assigned a color in the color palette, and the value is displayed in the Value box. You can add as many anchor nodes as you want. This lets you blend colors in many different ways on the color spectrum.

Delete Anchor Node

Left-click on an anchor node and press the DELETE key on the keyboard to delete a node. Nodes can also be dragged outside the top or bottom of the dialog to remove it from the spectrum. The first (far left) and last (far right) anchor nodes cannot be deleted.

Positioning an Anchor Node

To position an anchor node:

Move the mouse cursor over the slider button.
Click and hold the left mouse button.
Drag the slider button to the desired position and release the left mouse button. As you move the slider button, the data value is indicated in the Value box. Alternatively, you can set the anchor to a specific data value by entering a number into the Value box. Note that the beginning and ending anchors cannot be moved or deleted.
Reset the Minimum and Maximum to change the range, and therefore, the position of the starting and ending nodes.

Selecting a Color for an Anchor

To select a color to associate with the anchor node:

Click on the anchor you wish to modify.
Click on the desired color in the color palette. The color spectrum is updated to indicate the change.

Alternatively, use a preset .CLR color file by selecting one of the options from the Presets list or click the Load button to load a custom .CLR file.