manpage: document confusing "vf clr" command usage

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wm4 2016-07-03 13:45:18 +02:00
parent 1298c29dc7
commit 5d47f9a565
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@ -459,6 +459,8 @@ Input Commands that are Possibly Subject to Change
Remove all filters. Note that like the other sub-commands, this does
not control automatically inserted filters.
The argument is always needed. E.g. in case of ``clr`` use ``vf clr ""``.
You can assign labels to filter by prefixing them with ``@name:`` (where
``name`` is a user-chosen arbitrary identifier). Labels can be used to
refer to filters by name in all of the filter chain modification commands.