diff --git a/scripts/docs_gen.py b/scripts/docs_gen.py
index 3c178db..292b4b9 100755
--- a/scripts/docs_gen.py
+++ b/scripts/docs_gen.py
@@ -415,7 +415,8 @@ class LeafNode(object):
                 out.append("    " + line)
             out.append("")
             san_name = re.sub(r"[^A-Za-z0-9_]", "", self.name)
-            imgfile = "{0}{1}.{2}".format(
+            imgfile = "{}{}{}.{}".format(
+                "f_" if self.leaftype == "Function" else "",
                 san_name,
                 ("_%d" % exnum) if exnum > 1 else "",
                 "gif" if "Spin" in extype else "png"
diff --git a/scripts/make_all_docs.sh b/scripts/make_all_docs.sh
index 1b2bded..7546fef 100755
--- a/scripts/make_all_docs.sh
+++ b/scripts/make_all_docs.sh
@@ -3,7 +3,7 @@
 if [[ $# > 0 ]]; then
     PREVIEW_LIBS="$@"
 else
-    PREVIEW_LIBS="compat attachments math arrays vectors matrices coords geometry triangulation quaternions hull constants transforms primitives shapes masks paths beziers walls metric_screws threading involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra debug"
+    PREVIEW_LIBS="compat attachments math arrays vectors matrices coords geometry triangulation quaternions hull constants transforms primitives shapes masks shapes2d paths beziers walls metric_screws threading involute_gears sliders joiners linear_bearings nema_steppers wiring phillips_drive torx_drive polyhedra debug"
 fi
 
 dir="$(basename $PWD)"