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With i3, is it possible to have all new windows open in fullscreen by default? As far as I have been able to find, this is only possible for specified programmes.

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  • What I think is you should try something like [class="<>"] fullscreen enable. The only thing I have no idea how to specify in <> something that would match any window. The wildcard is the thing to try I guess.
    – ddnomad
    Jul 26, 2016 at 12:51

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You can use the following configuration setting:

for_window [class=".*"] fullscreen enable

The for_window [CRITERIA] COMMAND setting runs COMMAND for each new window matching CRITERIA. i3 uses PCRE (Perl-compatible regular expressions) for pattern matching, so the pattern .* matches any number of arbitrary characters. Meaning it matches any possible class name, even empty ones.

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