Changes to window title for all windows (and a special format for container titles).

i3/config

 # i3 config file (v4)
 # Please see http://i3wm.org/docs/userguide.html for a complete reference!
 
+# SETTERS
 # Set mod key (Mod1=<Alt>, Mod4=<Super>)
 set $mod Mod4
+set $border_no_name border pixel 5
+set $border_normal border normal 5
+set $con_title focus parent; title_format "<span foreground='pink'><b> 📦 %title</b></span>"; focus child
 
 # set default desktop layout (default is tiling) <stacking|tabbed>
 workspace_layout tabbed
 
 # Configure border style <normal|1pixel|pixel xx|none|pixel>
-for_window [class=".*"] border pixel 5
+for_window [class=".*"] $border_normal
 
 # Hide borders <none|vertical|horizontal|both|smart>
 hide_edge_borders none
 
 # change borders
 bindsym $mod+v border none
-bindsym $mod+b border pixel 5
-bindsym $mod+n border normal
+bindsym $mod+b $border_normal
+bindsym $mod+n $border_no_name
 
 # Font for window titles. Will also be used by the bar unless a different font
 # is used in the bar {} block below.
@@ -119,22 +123,22 @@ workspace_auto_back_and_forth yes
 # split orientations
 bindsym $mod+q layout toggle split;exec notify-send 'layout toggled'
 bindsym $mod+e layout toggle split;exec notify-send 'layout toggled'
-bindsym $mod+Mod1+q split h;
-bindsym $mod+Mod1+e split v;
+bindsym $mod+Mod1+q split h; $con_title
+bindsym $mod+Mod1+e split v; $con_title
 
 # change container layout (stacked, tabbed, toggle split)
 bindsym $mod+s layout stacking;exec notify-send 'stacking layout'
-bindsym $mod+Mod1+s split h; layout stacking
+bindsym $mod+Mod1+s split h; layout stacking; $con_title
 bindsym $mod+w layout tabbed;exec notify-send 'tabbed layout'
-bindsym $mod+Mod1+w split h; layout tabbed
+bindsym $mod+Mod1+w split h; layout tabbed; $con_title
 
 # special combo for horizontal split of two windows next to each other
-bindsym $mod+x split h, layout splith, focus right, move left, focus left
-bindsym $mod+Shift+x split h, layout splith, focus left, move right, focus right
+bindsym $mod+x split h, layout splith, focus right, $border_normal, move left, focus left, $border_normal, $con_title
+bindsym $mod+Shift+x split h, layout splith, focus left, $border_normal, move right, focus right, $border_normal, $con_title
 
 # special combo for container tabbed split of two windows next to each other
-bindsym $mod+z split h, layout tabbed, focus right, move left, focus left
-bindsym $mod+Shift+z split h, layout tabbed, focus left, move right, focus right
+bindsym $mod+z split h, layout tabbed, focus right, move left, focus left, $con_title
+bindsym $mod+Shift+z split h, layout tabbed, focus left, move right, focus right, $con_title
 
 # toggle fullscreen mode for the focused container
 bindsym $mod+space fullscreen toggle
@@ -225,6 +229,8 @@ bindsym $mod+Shift+8 move container to workspace $ws8; workspace $ws8
 # assign [class="Skype"] $ws5
 
 # Open specific applications in floating mode
+for_window [class=".*"] title_format " %title"
+for_window [class=".*"] $con_title
 for_window [title="alsamixer"] floating enable border pixel 1
 for_window [class="Calamares"] floating enable border normal
 for_window [class="Clipgrab"] floating enable