diff --git a/assets/html/help.html b/assets/html/help.html
index 66b52cc..dbf01fb 100644
--- a/assets/html/help.html
+++ b/assets/html/help.html
@@ -17,22 +17,31 @@ a:nth-of-type(2n+2), a { color: #ff0; }
 <h1>asciiblaster documentation</h1>
 
 <span style="white-space: pre; color: white;">
-These are some handy documents which address some of the more obscure
-features of the asdf.us color code tool:
+These are some handy documents which address some of the more obscure features of asciiblaster:
 
 <h2>Tips on using the keyboard</h2>
-These keyboard commands work in brush mode (square, circle, cross):
-
 <pre>
-[                          brush smaller
-]                          brush bigger
-ctrl~click on brush        erase cell
-ctrl~click on canvas       draw with bg color
-shift~click on canvas      draw line from last position
-alt~click on canvas        fill brush with sampled color
-alt~shift~click on canvas  copy canvas to brush
-rightclick on palette      set bg color (when drawing with a letter)
-
-h/t timb for guide
+[                                   Decrease brush size
+]                                   Increase brush size
+&lt;Alt&gt; + &lt;LMB&gt; on canvas             Fill brush with sampled color
+&lt;Alt&gt; + &lt;Shift&gt; + &lt;LMB&gt; on canvas   Copy canvas to brush
+&lt;Ctrl&gt; + &lt;LMB&gt; on brush             Erase cell
+&lt;Ctrl&gt; + &lt;LMB&gt; on canvas            Draw with background color
+&lt;Shift&gt; + &lt;LMB&gt; on canvas           Draw line from last position
+&lt;Shift&gt; + &lt;LMB&gt; on character box    Switch to next character set
+&lt;Shift&gt; + &lt;LMB&gt; on stored brush     Delete stored brush
+&lt;RMB&gt; on palette                    Set background color (when drawing with a letter)
 </pre>
 
+<h2>Notate bene</h2>
+Characters not forming part of the initial set in the character box beneath the colour palette
+encode to, assuming UTF-8, 2-3 bytes in total vs. one (1) byte for those part of the initial
+set (e.g. 0-9, A-Z, a-z, etc.)
+
+Repeating patterns of alternating back- and foreground colours, and vice versa, are encoded
+using a single (1) byte in mIRC format (video reverse) and as such save space, especially
+with large numbers of repetitions or alternations.
+
+<!--
+  vim:ts=2 sw=2 expandtab fenc=utf-8 foldmethod=marker nowrap tw=0
+  -->
diff --git a/assets/text/TODO b/assets/text/TODO
index 2f89051..f1b5cbc 100644
--- a/assets/text/TODO
+++ b/assets/text/TODO
@@ -1,11 +1,8 @@
 1)  bug: fix HTML & CSS
-2)  document: constraints for video reverse
-3)  document: Shift + LMB to delete brush, Shift + LMB to switch character sets
-4)  feature: allow to adjust cutoff warning threshold, {dis,en}able cutoff & print line numbers affected
-5)  feature: {bold,italic,underline} attributes
-6)  feature: keyboard instead of [LR]MB
-7)  feature: {line,measuring} tool
-8)  feature: status bar w/ position, etc.
-9)  feature: zoom {in,out}
-10) reimplement: ANSI, {save,upload} as PNG & gallery, shaders (possibly)
-11) releases: merge w/ MiRCARTools (into asciiblaster,) provide signed release APK
+2)  feature: {bold,italic,underline} attributes
+3)  feature: draw w/ keyboard instead of [LR]MB
+4)  feature: {line,measuring} tool
+5)  feature: status bar w/ position, etc.
+6)  feature: zoom {in,out} (esp. on Android)
+7)  reimplement: ANSI (maybe,) {save,upload} as PNG & gallery, cutoff (print line #(s) affected, tunably,) shaders (maybe)
+8)  releases: merge w/ MiRCARTools (into asciiblaster,) provide signed release APK