Several effects in GoldWave use Shape Controls to set graphical parameters or dynamically alter the effect across the selection. Shape Controls usually consist of a graph window and a set of controls, including a Point number box, an Add Point button, a Remove Point button, an X value box, and a Y value box as shown in the above.

Graph Window
The graph window initially contains a single line with two endpoints, shown as large dots. By clicking the left mouse button anywhere inside this window, you can add new points to bend the line into a variety of zigzag shapes. To move a point, click on it and drag it to a new location. To remove a point, click the right mouse button over the point. Note that endpoints cannot be removed.

Controls
Points can be added, moved, and removed by using these controls. Use the Point box to select the current point. Change the X and Y values to move the point. Use the Add Point button to insert a new point between the current point and the next point. Use the Remove Point button to remove the current point, except if it is an endpoint.

Shape Controls
Control Description
Graph Window Displays the current shape and graph. Click the mouse in the window to add points. Right-click to remove a point.
Point Sets the current point and associates X, Y, and Remove Point to that point.
X Sets the X value for the current point.
Y Sets the Y value for the current point.
Add Point Adds a new point between the current point and the next point.
Remove Point Removes the current point.
Time Adjusts the time within the selection for the graph. May set the preview start time.

Some dynamic effects, such as , , and start audio based on the current point's time value. If the X value of the current point is 1:00, for example, then preview playback starts at that time rather than at the beginning of the selection. This lets you preview the point's settings without playing the entire selection.

To save a shape, use the controls, explained above.