When you open a log in TailExpert,
it will be added to the active logs in the treeview pane. When you
already have defined filters for this log, these filters will be
added to the logname node for quick access. By clicking on the
filter you can activate (or toggle activation depending on
settings) the filter. To remove the filter(s) you just click on the
logname node and TailExpert will remove all filters and reload the
log.