The Termux:Float app supports defining various settings in ~/.termux/termux.float.properties file like the Termux app does in ~/.termux/termux.properties file for version >= 0.15.0. Currently, only the following properties are supported: enforce-char-based-input, ctrl-space-workaround, bell-character, terminal-cursor-style, terminal-transcript-rows, back-key, default-working-directory, volume-keys. Check Terminal Settings for more info. The ~/ is a shortcut for the Termux home directory /data/data/com.termux/files/home/ and can also be referred by the $HOME shell environment variable.