| To select a crop or fold mark | Press Option or Alt and click the mark. |
| To select multiple crop or fold marks | Hold Shift+Option or Shift+Alt and click the marks one at a time. |
| To delete crop or fold marks | Select the mark (or marks) and press Delete. |
| To restore a partial set of crop marks to a full set | In the crop mark properties, click the Place crop marks on outside of imposition check box until it is in a cleared state or a selected state with a white background, depending on your requirements. |
| To delete an entire crop mark set | Select one or more crop marks and press Delete. |
| To configure default white knockout under marks | In the Preferences dialog box, on the Marks tab, under Other Marks, select the appropriate checkbox: Add white KO under crop marks or Add white KO under fold marks |
