I was going to mention multitail as well, which is a fantastic utility. That and rsstail, both by Folkert Van Heusden, are quite slick. The mark it leaves (a red line across the screen) is even more visible than those given by less.
I've commented a bit more on them (in the context of other RSS tools) here:
Though not quite applicable to logfiles, I've written a script to tail my Newsbeuter feed URLs with Multitail support, for a console / terminal-based RSS feed.
I've commented a bit more on them (in the context of other RSS tools) here:
https://www.reddit.com/r/dredmorbius/comments/1udv6i/further...
Folkert's site: http://www.vanheusden.com/ http://www.vanheusden.com/multitail/ http://www.vanheusden.com/rsstail/
Though not quite applicable to logfiles, I've written a script to tail my Newsbeuter feed URLs with Multitail support, for a console / terminal-based RSS feed.