diff --git a/doc/5-wave/README.md b/doc/5-wave/README.md
index 7c586ef78..8b0db521a 100644
--- a/doc/5-wave/README.md
+++ b/doc/5-wave/README.md
@@ -27,8 +27,11 @@ Amiga               |  ≤256 | 256    |
 
 controls across the top line:
 - waveform number. the `-` and `+` buttons step through the list.
-- open.
-- save.
+- open. opens a file selector to choose the file to open.
+- save. opens a file selector to choose the file to save to.
+  - right-clicking brings up a menu:
+    - **save as .dmw...**: saves the selected wavetable in DefleMask format.
+    - **save raw...**: saves the selected wavetable as raw data.
 - **Steps**: view waveform as discrete blocks.
 - **Lines**: view waveform as a continuous line.
 - **Width**: length of the waveform data. maximum is 256.
diff --git a/doc/6-sample/README.md b/doc/6-sample/README.md
index bd5767fcb..ccd663c1f 100644
--- a/doc/6-sample/README.md
+++ b/doc/6-sample/README.md
@@ -75,7 +75,11 @@ in there, you can modify certain data pertaining to your sample, such as the:
 
 - top-left drop-down box: sample slot.
 - **Open**: replaces current sample.
+  - Right-clicking brings up a menu:
+    - **import raw...**: brings up a file selector, then presents a dialog to choose the format of the selected file.
 - **Save**: saves current sample to disk.
+  - Right-clicking brings up a menu:
+    - **save raw...**: brings up a file selector, then saves the sample as raw data.
 - **Name**: name in sample list.
 - button to left of **Info**: collapses and expands the info bar.
 - **Type**: sample format. only 8-bit and 16-bit PCM samples are editable. selecting a format converts the sample data.
diff --git a/doc/8-advanced/piano.md b/doc/8-advanced/piano.md
index 6217f8473..8a135f6fd 100644
--- a/doc/8-advanced/piano.md
+++ b/doc/8-advanced/piano.md
@@ -29,10 +29,11 @@ Key layout:
 - **Standard**: Black keys are 2/3 length.
 - **Continuous**: Black keys are full length.
 
-Value input pad: (document this)
+Value input pad: applies to mobile UI only.
 - **Disabled**
 - **Replace piano**
 - **Split (automatic)**
 - **Split (always visible)**
 
-**Share play/edit offset/range**: (document this)
+**Share play/edit offset/range**: If disabled, the piano will keep different octave and range values for playback and non-playback states.
+**Read-only (can't input notes): Prevents note entry.
\ No newline at end of file