Sometimes we will get some feedback from customer that on their computer the hatch dialog cannot be displayed fully, so they cannot see the OK and CANCEL button.
Just make a backup of the following item and try to delete it and restart ZWCAD:
Computer\HKEY_CURRENT_USER\Software\ZWSOFT\ZWCAD\2020\en-US\Profiles\Default\UserInterfaceSettings\HatchDlg