Update User Manual

User-Manual.md

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-User manual will go here. Yes, I wrote one, but it's in Libre Office format right now...
+User manual will go here. Yes, I wrote one, but it's in Libre Office format right now...
+
+The screenshots:
+
+
+## Main view: 
+
+![0_view_tab](uploads/170662e97b314a75a9e49558db5beb76/0_view_tab.png)
+This is the main tab and view for wfview. From this screen, you can adjust the waterfall display, change the radio's mode, frequency, AF gain, and RF (receive) gain. 
+
+The center divider, between the "plot" at the top and the "waterfall" at the bottom can be dragged vertically if you prefer to see more of the waterfall or more of the plot. To adjust the bounds of the waterfall and plot, use the Edge and Span (center) options. Edge allows you to select between the three edge presets on the IC-7300, typically the CW portion, Phone portion, or the entire portion of the band. If "Center Mode" is checked, then one can select the desired span, in Khz, to either side of the center, using the pop-down menu. These are all the same controls that one finds at the screen of the IC-7300. 
+
+To clear the peaks of the plot at the top, press "Clear Peaks". To pause the waterfall display, press "Stop WF". To start again, press "Start WF". This option is here because it can be useful to stop the display all together when viewing remotely if the link isn't fast enough. You can also use this feature to grab a screenshot of something before it scrolls off the display. 
+
+To jump to a signal, simply double-click on the waterfall. If you just want to get a fix on what frequency a signal is, you can single-click on the waterfall and the frequency will be reported at the bottom of the window in the status bar. 
+
+The large circular knob can also be used to change frequencies. It can either be dragged around, or, the scroll wheel of the mouse can turn the knob simply by placing the mouse over the control and rotating the scroll wheel. If you hold down shift or control while scrolling here, the step size increases to 1Khz rather than the default 100 Hz. You can also do the same using the + and - keys, such as on a numeric keypad. Page up and Page down allow one to just surf by the MHz. Icom should have put those buttons on the front of the rig! 
+
+To select a mode, use the Mode pop-down menu. You can also just hit the "/" key to cycle between the most common of these modes. 
+
+To switch from full-screen to windowed mode, just press F11 or toggle the setting on the Settings tab. 
+
+You'll notice there are some other tabs at the top of the window. You can switch tabs by clicking of course, or you can use the F1, F2, F3, and F4 keys. For the convenience of folks using a numeric keypad, the star key ("*") jumps right to the Frequency tab and focuses the input on the frequency input box. 
+
+
+## The Band tab: 
+
+![1_band_tab](uploads/3d01a28419207567af61273307e868fd/1_band_tab.png)
+
+This tab is pretty self-explanatory. Each button corresponds to a ham radio band. It is basically the same as if one long-presses on the MHz part of the frequency on the IC-7300 display and gets to the "band stacking" register. The bottom pop-down menu lets you select if you will be jumping to the most recently used frequency on the selected band, or one that was used further back in the stack. Each button has a keystroke. I had to get creative with the keystrokes, and you can read about them on the [keystrokes](https://gitlab.com/eliggett/wfview/-/wikis/Keystrokes) page of the wiki. For 60 meters, the IC-7300 doesn't have a band stacking register that I can tell, so it just takes you to the first 60M channel. If you have a suggestion on how to implement this better, I'd love to hear it. 
+
+
+## The Frequency tab:
+![2_freq_tab](uploads/54eeeb9319fda61e2b45f1137d733247/2_freq_tab.png)
+Like the band tab, this tab is pretty simple. Key in the frequency you want, either using the keyboard or by pressing the buttons. Now press Enter. Done. If you want to store a preset, first get the radio to the mode and frequency desired. Once you have that, just type in the preset number and then hit "STO". To recall, type the preset number and hit "RCL". If you ever used an RPN calculator, you already know how to do this. Presets are saved, by the way, in the preference file in plain text. Do be sure and press the "Save Settings" button on the settings tab if you modify the presets. The plain text file is located in ~/.config/eliggett/wfview.conf. I am sorry that the presets are not written to the file in any kind of logical order, and it appears the only way to change it is for me to roll my own preference class... This frequency tab, by the way, works great from a touch screen. That's why the "Back" and "CE" buttons are here -- needed if you don't have a keyboard. 
+
+
+
+## The Settings tab: 
+![3_settings_tab](uploads/ce5cec5f966a27480b1be7c868db58f5/3_settings_tab.png)
+From this tab, you can adjust radio and wfview settings.