Could you point to an example? Beyond Frontail which I assume is what you are referring to as the built in one, all the screen shots I’m aware of are using tail -f on the command line. A few are using [multitail] color scheme for openhab logs. For example:
The above screenshot shows openhab.log at the top, my Rules log file in the middle (I’ve modified the logging config to log Rules to their own file), and events.log at the bottom.
But none of these are graphical. they are pure text based and run from the command line. And they don’t do anything to address “everything scrolls so quickly” because it shows you the logs as they are written to.
But one thing you should use is the filter option in Frontail or grep with tail to only show you the log statements you care about. See How to watch and look through logging for details.
Multitail also has a few useful features. You can stop the scrolling in one of the panes and go back by pressing “b”. Pressing “space” will put a red marker line in all three panes which can be useful to see where the logs line up with each other or to easily see what events occurred after you pressed the space (e.g. press space and then kick off an event to test something). You can also search through the open logs or configure a standing search that highlights lines that match. All this stuff helps, but none of it is graphical.