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+<h1>Frequency Display Plugin</h1>
+
+<h2>Introduction</h2>
+
+The Frequency Display plugin displays the center frequency and/or power of a selected channel.
+The displayed values are scaled to the size of the window, so can be made large enough to be visible from a distance.
+Optionally, the values can be spoken whenever they change, which may be useful when tuning circuits or antennas and the screen isn't visible.
+
+<h2>Interface</h2>
+
+![Frequency Display plugin GUI](../../../doc/img/FreqDisplay_plugin.png)
+
+<h3>1: Channel</h3>
+
+Select which TX or RX channel to display the centre frequency or power for.
+
+In order for the power to be able to displayed, the channel must include a value with the channelPowerDB key in its channel report.
+
+<h3>2: Display</h3>
+
+Choose the text to display:
+
+* Frequency - displays the selected channel's (1) centre frequency in Hz.
+* Power - displays the selected channel's (1) power in dB.
+* Frequency & Power - displays the selected channel's (1) centre frequency in Hz and power in dB.
+
+<h3>3: T - Transparent</h3>
+
+When Transparent mode is checked, only the centre frequency and/or power will be displayed with a transparent background,
+so it can be overlaid on other windows.
+
+![Transparent Frequency Display](../../../doc/img/FreqDisplay_plugin_transparent.png)
+
+When in transparent mode, the text can be repositioning by clicking and dragging it.
+To exit transparent mode, right click on any of the text, and select "Exit transparent mode" from the pop-up menu.
+
+<h3>4: Speech</h3>
+
+When Speech mode is checked, whenever the displayed frequency and/or power value changes, the new value will be spoken.
+
+<h3>5: Units</h3>
+
+Specify the units for the frequency value:
+
+* Hz
+* kHz
+* MHz
+* GHz
+
+<h3>6: U - Display Units</h3>
+
+When the U button is checked, units will be displayed and spoken.
+
+<h3>7: Freq DP - Frequency Decimal Places</h3>
+
+Freq DP specifies the number of decimal places used to display frequency values, when the units (5) are not Hz.
+
+<h3>8: Power DP - Power Decimal Places</h3>
+
+Power DP specifies the number of decimal places used to display power values.
+
+<h3>9: Font</h3>
+
+Select the font used to display frequency and power values.
+
+<h3>10: Font Colour</h3>
+
+Select the colour for the font used to display frequency and power values.