From https://bugs.launchpad.net/catfish-search/+bug/1512031 I prefer to have the window close/minimize/maximize controls on the left, and have placed them there with Customize Look and Feel. However, catfish places its own window controls on the right (with a different Theme, as well). I checked the Preferences, in case (as with Chromium) there were an option to "Use System Title Bar and Borders", but found none. ------- [This seems to be the same bug as with eog (Gnome Image Viewer), and I have filed a bug report for that as well (Bug #1511616) In case it is useful, I here quote a comment for that bug, that states: "That has to do with the use of CSD/GtkHeaderBar that doesn't work great out of gnome-shell" On that bug report page, it states that it apparently is an "upstream bug" and I ought to report it upstream as well. If that is so here as well (as seems likely), tell me, and I will do the same for catfish as I will do for eog.]
Sean Davis referenced this bugreport in commit 75dce159cb602d9d2c6f23d937a2e10e8080e613 Add DE detection for headerbar usage: use headerbar for Budgie, GNOME, and Pantheon; titlebar for all others (bug #14486) https://git.xfce.org/apps/catfish/commit?id=75dce159cb602d9d2c6f23d937a2e10e8080e613
This issue should be resolved with the above commit. LXDE will now use the titlebar layout by default.