diff --git a/README.md b/README.md
index aa7c434..92338e5 100644
--- a/README.md
+++ b/README.md
@@ -1,8 +1,8 @@
 # *W*rapped _d2_
 
-A wrapper over [d2] which allows to use `layout`, `theme`, `dark-theme`, `pad`,
-`sketch` and `port` attributes from d2 file. All arguments will be passed to the
-d2 cli, but these additional configs overwrite cli arguments with the same name.
+A wrapper over [d2] which allows to use cli/env configuratios as additional
+specific attributes from d2 file. All these attributes will be passed to the d2
+cli and overwrite cli parameters with the same name.
 
 [d2]: https://github.com/terrastruct/d2
 
@@ -48,6 +48,16 @@ You can also use inline style to configure d2
 x -> y -> z
 ```
 
+# Supported configurations
+
+- port
+- layout
+- theme
+- dark-theme
+- pad
+- sketch
+- force-appendix
+
 # Limitation
 
 You have to restart the watch server when you change the `layout`, `theme`,
diff --git a/wd2 b/wd2
index 8ac7e12..529aca7 100755
--- a/wd2
+++ b/wd2
@@ -8,12 +8,23 @@ d2_input_file=
 function print_help() {
   cat <<EOF
 Usage:
-  wd2 [FLAGS...] file.d2 [file.svg | file.png]
+  wd2 [--watch] [FLAGS...] file.d2 [file.svg | file.png]
 
-A wrapper over d2 which allows to use 'layout', 'theme', 'dark-theme',
-'pad', 'sketch' and 'port' attributes from d2 file. All arguments will
-be passed to the d2 cli, but these additional configs overwrite cli
-arguments with the same name.
+A wrapper over d2 which allows to use cli/env configuratios as additional
+specific attributes from d2 file. All these attributes will be passed to the d2
+cli and overwrite cli parameters with the same name.
+
+# Supported configurations
+
+- port
+- layout
+- theme
+- dark-theme
+- pad
+- sketch
+- force-appendix
+
+-------------------------------------------------------------------------------
 
 $(d2 --help | tail -n +6 - | sed -e 's/d2 \(layout\|fmt\)/wd2 \1/')
 EOF
@@ -48,7 +59,10 @@ function parse_args() {
 }
 
 function get_attr_value() {
-  head -n10 "$d2_input_file" | grep "$1" | awk -F"$1: " '{ print $2 }' | cut -d';' -f1
+  grep "^#" "$d2_input_file" \
+    | grep "$1" \
+    | awk -F"$1: " '{ print $2 }' \
+    | cut -d';' -f1
 }
 
 parse_args "$@"
@@ -65,6 +79,7 @@ d2_dark_theme=$(get_attr_value "dark-theme")
 d2_pad=$(get_attr_value "pad")
 d2_sketch=$(get_attr_value "sketch")
 d2_port=$(get_attr_value "port")
+d2_force_appendix=$(get_attr_value "force-appendix")
 set -e
 
 d2 "${d2_args[@]}" \
@@ -73,5 +88,6 @@ d2 "${d2_args[@]}" \
   ${d2_dark_theme:+--dark-theme=${d2_dark_theme}} \
   ${d2_pad:+--pad=${d2_pad}} \
   ${d2_sketch:+--sketch=${d2_sketch}} \
-  ${d2_port:+--port=${d2_port}}
+  ${d2_port:+--port=${d2_port}} \
+  ${d2_force_appendix:+--force-appendix=${d2_force_appendix}}