The register view displays the current contents of all machine
  registers.

  To display the register view, choose Views...  from the Options menu,
  then click on the button for Registers.

  By default, the register view automatically displays the register
  values associated with the routine in which execution is currently
  paused.  Any values that change as your program executes are
  highlighted whenever the debugger regains control from your program.

  To display the register values associated with any routine on the call
  stack, choose its name from the Call Stack menu on the main window.

  To change the value stored in a register:

  1.  Click on the register value in the register view.  A small dialog
      box appears over the current value, which you can now edit.

  2.  Enter the new value in the dialog box.

  3.  Click on the check mark (OK) in the dialog box.  The dialog box is
      removed and replaced by the new value, which indicates that the
      register now contains that value.

  To cancel a text entry and dismiss the dialog box, click on X (Cancel).