Setting bookmarks. Use the bookmarks options to define bookmark levels, create bookmarks from paragraph tags, and set up article threading. 1. In the PDF Setup dialog box, choose Bookmarks from the pop-up menu, or click the Bookmarks tab (Windows/UNIX). 2. Select Generate PDF Bookmarks.
Horizontal Pendular Nystagmus. 1  Lesions of the central tegmental tract (such as due to MS) 2  Spasmus Nutans (can also be vertical, torsional) 3  Nystagmus of the blind.  Congenital nystagmus.
The rhythmic pace of the eye movements can be further broken down into slow and fast phases. Here is a list and brief description of the different types of nystagmus: 1  Latent: Symptoms worsen when one eye is covered.  Manifest: Symptoms are present at all times.