Normally, less will highlight ALL strings which match the last search command. The -g option changes this behavior to highlight only the particular string which was found by the last search command. This can cause less to run somewhat faster than the default.
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## create a long file with 200 lines > myfile; i=1; while [ $i -le 200 ]; \ do echo "$i" >> myfile; ((i++)); done ## default less myfile ## in the interactive mode type /9 to search 9 ## higlights all lines having 9 like 9, 19, 29 etc. ## less -g or --hilite-search options less -g myfile ## in the interactive mode type /9 to search 9 ## highlights only 9 rm myfile |