The inverse search allows you to jump from a certain position in your dvi, ps, or pdf file to the corresponding position in your tex sources. A lot of document viewers support the inverse search, e.g.
Set up inverse search in your document viewer
Go to Settings -> Configure Okular -> Editor. Choose Custom Text Editor and enter the following as editor command:
You can initiate the inverse search by pressing shift + left mouse button.
Go to Settings -> Configure KDVI -> KDVI Specials. Choose User-Defined Editor and enter the following as shell command:
Go to Skim -> Preferences -> Sync. For PDF-Tex Sync Support choose Custom and for Command enter:
and for Arguments enter: