Updated Configuring shell key bindings (markdown)

Configuring-shell-key-bindings.md

@@ -1,3 +1,19 @@
+## Changing the layout
+
+The key bindings use `--height` option to display fzf finder below your cursor, but it's configurable.
+
+If you prefer to run fzf in full screen mode, add `--no-height` to your `$FZF_DEFAULT_OPTS` like follows:
+
+```sh
+export FZF_DEFAULT_OPTS='--no-height --no-reverse'
+```
+
+Or if you prefer to start in a tmux split pane, set `$FZF_TMUX` to `1`.
+
+```sh
+export FZF_TMUX=1
+```
+
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