Make sure you have the correct Bond spacing. You can check the settings in the following way:
- Open the Documents Settings dialog from the ChemDraw File menu.
- Go to the “Drawing” tab.
- Select the "Spacing" option and change it to “% of length” with a bond spacing of “12”. Deselect the "absolute" (-0 in) if that option has already been selected.
- Then click the OK button, and you will get the following warning dialog.
- Click the Modify existing button to override the old setting present in your old documents.