diff --git a/documentation/02 _ Shortcuts.md b/documentation/02 _ Shortcuts.md
new file mode 100644
index 0000000000000000000000000000000000000000..2469cc6b745385d36a5b0d03290fd1f7725689b8
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+++ b/documentation/02 _ Shortcuts.md
@@ -0,0 +1,13 @@
+# Shortcuts
+
+<br />
+
+Below is a list of available keyboard shortcuts for commonly used operations and
+forms.
+
+<br />
+
+| Shortcut | Combination |
+| -------- | ----------- |
+| Ctrl + I | Open Documentation Viewer |
+| Ctrl + F | Open folder (Change data directory to another location) |
diff --git a/documentation/05 _ Read from Memory Card.help.md b/documentation/05 _ Read from Memory Card.help.md
new file mode 100644
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+## To read data from external memory card:
+There are different kinds of memory cards that can be used in SOH
+View, eg. SD card, CF card or flash drive.
+
+To read data from a memory card, check the checkbox "From Memory Card".
+
+Directory List box will display "Memory Card" and the data in the selected card can be
+read without selecting "Memory Card" in the Directory List box.
+
+<br />
+<br />
+<img alt="From Memory Card checkbox" src="images/memory_card/from_memory_card_checkbox.png" height="80" />
+<br />
+
+Note: This will work the same way as selecting the first level folder of a data set.
+
+### Baler data
+Baler data has data/ folder for main data and sdata/ folder for backup
+data. When Baler data is selected, the radio buttons for data/ and sdata/
+are enable for user to select one of the folder to read from.
+
+<br />
+<br />
+<img alt="data/sdata radio buttons" src="images/memory_card/data_sdata_radio_buttons.png" height="80" />
+<br />
+
+### CF card
+When CF card which contents RT130 data is selected, the serial numbers of the
+DASs in the CF card will be listed for user to select for reading.
+
+<br />
+<br />
+<img alt="DAS in CF Card" src="images/memory_card/das_in_cf_card.png" height="100" />
+<br />
+
+Note: DASs list will be displayed in the File List box no matter the From Data
+Card checkbox is checked or not.
\ No newline at end of file
diff --git a/documentation/10 _ TPS Dialog.help.md b/documentation/10 _ TPS Dialog.help.md
new file mode 100644
index 0000000000000000000000000000000000000000..24925be708bd155ed5af831d21e64854b165f74d
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+++ b/documentation/10 _ TPS Dialog.help.md
@@ -0,0 +1,93 @@
+# Plotting TPS
+Each block of TPS shows the square root of the average of the squares of
+each 5 minute of data. Each TPS bar consists of 288 blocks bar representing a
+UT day. One TPS channel channel consists of multi TPS bars depends on the time
+range the channel cover.
+
+Each 5-minute block is color-coded according to the average amplitude
+during the period following the Color range code at the end of this document.
+<br />
+
+---------------------------
+---------------------------
+# TPS Dialog
+
+<br />
+<img alt="TPS Dialog" src="images/tps/tps_dialog.png" width="700" />
+<br />
+
+TPS are plotted in tab(s).
+
+* If total days <= 180: all channels are plotted in one tab.
+* If total days > 180: each channel will be plotted in a separate tab.
+<br />
+---------------------------
+---------------------------
+# TPS Color Range
+
+<br />
+<br />
+<img alt="Change TPS Color Range" src="images/tps/tps_color_range.png" height="100" />
+<br />
+
+## Selecting Color Range
+User can select the desired color range from the dropdown list in the above picture. There are 4 different
+color ranges in the list: Antarctica, Low, Medium and High
+<br />
+
+## Applying the selected Color Range
+* Click button "RePlot Current Tab" to apply new selected color range to TPS plots in the current tab.
+* Click button "RePlot All Tabs" to apply new selected color range to TPS plots in all tabs.
+<br />
+
+## Color range code
+**Antarctica**
+* Dark Grey/Black: there was no data for that period or the average really
+was 0.0 (not likely)
+* Dark blue: the average was +/-10 counts
+* Cyan: +/-100 counts
+* Green: +/-1,000 counts
+* Yellow: +/-10,000 counts
+* Red: +/-100,000 counts
+* Magenta: +/-1,000,000 counts
+* Light Grey/White: > +/-1,000,000 counts
+<br />
+
+**Low**
+* Dark Grey/Black: there was no data for that period or the average
+really was 0.0 (not likely)
+* Dark blue: the average was +/-20 counts
+* Cyan: +/-200 counts
+* Green: +/-2,000 counts
+* Yellow: +/-20,000 counts
+* Red: +/-200,000 counts
+* Magenta: +/-2,000,000 counts
+* Light Grey/White: > +/-2,000,000 counts
+<br />
+
+**Medium**
+* Dark Grey/Black: there was no data for that period or the average really
+was 0.0 (not likely)
+* Dark blue: the average was +/-50 counts
+* Cyan: +/-500 counts
+* Green: +/-5,000 counts
+* Yellow: +/-50,000 counts
+* Red: +/-500,000 counts
+* Magenta: +/-5,000,000 counts
+* Light Grey/White: > +/-5,000,000 counts
+<br />
+
+**High**
+* Dark Grey/Black: there was no data for that period or the average really
+was 0.0 (not likely)
+* Dark blue: the average was +/-80 counts
+* Cyan: +/-800 counts
+* Green: +/-8,000 counts
+* Yellow: +/-80,000 counts
+* Red: +/-800,000 counts
+* Magenta: +/-8,000,000 counts
+* Light Grey/White: > +/-8,000,000 counts
+
+<br />
+
+
diff --git a/sohstationviewer/controller/util.py b/sohstationviewer/controller/util.py
index 3f8eefceeba71615bd72eea8213a0b39896c1664..53677dc486423d32725f9d0ad82d6f7b2490d159 100644
--- a/sohstationviewer/controller/util.py
+++ b/sohstationviewer/controller/util.py
@@ -36,7 +36,7 @@ def validate_file(path2file: Union[str, Path], file_name: str):
def validate_dir(path: str):
"""
- When selecting option "From Data Card", all files and folders out of
+ When selecting option "From Memory Card", all files and folders out of
the data folder may be processed. This check help to skip checking
system/info/meta folders. If check fail, raise Exception.