static JComponent dm_ajc_parametersSection() {
  int timeFieldMinWidth = 40;
  ret jCenteredSection("Jump Cut Parameters", centeredLineWithSpacing(20,
    withLabelLeftAndRight("Volume threshold:", dm_spinner volumeThresholdPercent(0, 100), "%"),
      withLabelLeftAndRight("Shortest silence to cut:", jMinWidth(timeFieldMinWidth, dm_centeredTextField minSilence()), "s"),
      jline(
        withLabel("Lead-in/out:", jMinWidth(timeFieldMinWidth, dm_centeredTextField leadIn())),
        jlabel("/"),
        withLabelToTheRight(jMinWidth(timeFieldMinWidth, dm_centeredTextField leadOut()), "s"))));
}