diff --git a/docs/lab/index.html b/docs/lab/index.html
index e61713d69..ca95714cd 100644
--- a/docs/lab/index.html
+++ b/docs/lab/index.html
@@ -1338,27 +1338,31 @@ document.head.appendChild(fontCSS)
 
       <div class="checkbox-group">
       <span>Features:</span>
-      <label title="Discretionary ligatures, e.g. !? -> interrobang"><input type="checkbox" class="featopt" name="feat:dlig"> Enable dlig</label>
-      <label title="Convert all numbers to numerators"><input type="checkbox" class="featopt" name="feat:numr"> Enable numr</label>
-      <label title="Convert all numbers to denominators"><input type="checkbox" class="featopt" name="feat:dnom"> Enable dnom</label>
-      <label title="Tabular numbers (fixed width)"><input type="checkbox" class="featopt" name="feat:tnum"> Enable tnum</label>
-      <label title="Upper case adjustments"><input type="checkbox" class="featopt" name="feat:case"> Enable case</label>
-      <label title="Slashed zero"><input type="checkbox" class="featopt" name="feat:zero"> Enable (slashed) zero</label>
-      <label title="Contextual automatic fractions"><input type="checkbox" class="featopt" name="feat:frac"> Enable frac</label>
-      <label title="Superscript"><input type="checkbox" class="featopt" name="feat:sups"> Enable sups</label>
-      <label title="Subscript"><input type="checkbox" class="featopt" name="feat:subs"> Enable subs</label>
-      <label title='Capital Spacing (adds 16 UPM to each sidebearing)'><input type="checkbox" class="featopt" name="feat:cpsp"> Enable cpsp</label>
-      <label title='Stylistic Alternates'><input type="checkbox" class="featopt" name="feat:salt"> Enable salt</label>
-      <label title='Stylistic set 1 "Open Digits"'><input type="checkbox" class="featopt" name="feat:ss01"> Enable ss01</label>
-      <label title='Stylistic set 1 "Disambiguation"'><input type="checkbox" class="featopt" name="feat:ss02"> Enable ss02</label>
-      <label title='Character Variant 1 "Alternate one"'><input type="checkbox" class="featopt" name="feat:cv01"> Enable cv01 (1)</label>
-      <label title='Character Variant 2 "Open four"'><input type="checkbox" class="featopt" name="feat:cv02"> Enable cv02 (4)</label>
-      <label title='Character Variant 3 "Open six"'><input type="checkbox" class="featopt" name="feat:cv03"> Enable cv03 (6)</label>
-      <label title='Character Variant 4 "Open nine"'><input type="checkbox" class="featopt" name="feat:cv04"> Enable cv04 (9)</label>
-      <label title='Character Variant 5 "Lower case L with tail")'><input type="checkbox" class="featopt" name="feat:cv05"> Enable cv05 (L)</label>
-      <label title="Contextual alternates"><input type="checkbox" class="featopt" name="feat:calt=0"> Disable calt</label>
-      <label title="Common ligatures (there are no common ligatures in Inter UI, but the font you are comparing to may have)"><input type="checkbox" class="featopt" name="feat:liga=0"> Disable liga</label>
-      <label title="Kerning"><input type="checkbox" class="featopt" name="feat:kern=0"> Disable kern</label>
+      <label title="Discretionary ligatures, e.g. !? -> interrobang"><input type="checkbox" class="featopt" name="feat:dlig"> dlig &nbsp;(Discretionary ligatures)</label>
+      <label title="Convert all numbers to numerators"><input type="checkbox" class="featopt" name="feat:numr"> numr &nbsp;(Numerators)</label>
+      <label title="Convert all numbers to denominators"><input type="checkbox" class="featopt" name="feat:dnom"> dnom &nbsp;(Denominators)</label>
+      <label title="Tabular numbers (fixed width)"><input type="checkbox" class="featopt" name="feat:tnum"> tnum &nbsp;(Tabular numbers)</label>
+      <label title="Upper case adjustments"><input type="checkbox" class="featopt" name="feat:case"> case &nbsp;(Case alternates)</label>
+      <label title="Slashed zero"><input type="checkbox" class="featopt" name="feat:zero"> zero &nbsp;(Slashed zero)</label>
+      <label title="Contextual automatic fractions"><input type="checkbox" class="featopt" name="feat:frac"> frac &nbsp;(Auto fractions)</label>
+      <label title="Superscript"><input type="checkbox" class="featopt" name="feat:sups"> sups &nbsp;(Superscript)</label>
+      <label title="Subscript"><input type="checkbox" class="featopt" name="feat:subs"> subs &nbsp;(Subscript)</label>
+      <label title='Capital spacing (adds 16 UPM to each sidebearing)'><input type="checkbox" class="featopt" name="feat:cpsp"> cpsp &nbsp;(Capital spacing)</label>
+      <label title='Stylistic Alternates'><input type="checkbox" class="featopt" name="feat:salt"> salt &nbsp;(Stylistic Alternates)</label>
+      <label title='Stylistic set 1 "Open Digits"'><input type="checkbox" class="featopt" name="feat:ss01"> ss01 &nbsp;(Open Digits)</label>
+      <label title='Stylistic set 1 "Disambiguation"'><input type="checkbox" class="featopt" name="feat:ss02"> ss02 &nbsp;(Disambiguation)</label>
+      <label title='Character Variant 1 "Alternate one"'><input type="checkbox" class="featopt" name="feat:cv01"> cv01 &nbsp;(Alternate one)</label>
+      <label title='Character Variant 2 "Open four"'><input type="checkbox" class="featopt" name="feat:cv02"> cv02 &nbsp;(Open four)</label>
+      <label title='Character Variant 3 "Open six"'><input type="checkbox" class="featopt" name="feat:cv03"> cv03 &nbsp;(Open six)</label>
+      <label title='Character Variant 4 "Open nine"'><input type="checkbox" class="featopt" name="feat:cv04"> cv04 &nbsp;(Open nine)</label>
+      <label title='Character Variant 5 "Lower case L with tail")'><input type="checkbox" class="featopt" name="feat:cv05"> cv05 &nbsp;(Lower case L with tail)</label>
+      </div>
+
+      <div class="checkbox-group">
+      <span>Default-on features:</span>
+      <label title="Contextual alternates"><input type="checkbox" class="featopt" name="feat:calt=0"> Disable calt &nbsp;(Contextual alternates)</label>
+      <label title="Common ligatures (there are no common ligatures in Inter UI, but the font you are comparing to may have)"><input type="checkbox" class="featopt" name="feat:liga=0"> Disable liga &nbsp;(Common ligatures)</label>
+      <label title="Kerning"><input type="checkbox" class="featopt" name="feat:kern=0"> Disable kern &nbsp;(Kerning)</label>
       <!-- <label><input type="checkbox" class="featopt" name="feat:onum"> Enable onum</label> -->
       <!-- <label><input type="checkbox" class="featopt" name="feat:pnum"> Enable pnum</label> -->
       <!-- <label><input type="checkbox" class="featopt" name="feat:lnum"> Enable lnum</label> -->