To edit a function's parameters:

  1. Click the function icon in the center pane. The expression corresponding to the function appears in the Properties window.

    The Properties window is located at the lower right-hand corner of Oracle JDeveloper, by default. If the Properties window does not appear, click Properties under the Window menu to display the Properties window. You can optionally choose to drag the Properties window to any convenient location within the JDeveloper window. You can also resize the Properties window, as desired.

  2. Edit the expression that appears in the right pane of the Properties window.

    The left pane of the Properties window shows the variable tree that includes all variables visible in the current scope. You can drag and drop variables to the expression on the right to help build your function definition.

  3. Click Commit at the top left corner of the Properties window to save the changes. Alternatively, click Revert to mapper sources to revert changes made in the Properties window.