If you want to specify where the `previous link' of your page points, use a <prev> tag inside the <head>...</head> section of your source file.
The format of this tag is:
<prev id="pagename">where the pagename is the short name of the directory containing the target file you want to point to, followed by a slash and the name of the target file (without its extension). The directory name and slash can be omitted if the target file is in the same directory as the referring file.
<prev id="tex/latex"> <next id="setup">
If you want your page not to have a previous link, use: