MULPLT has 3 modes:

  multi trace mode:  Displaying many traces, some picking options
  single trace mode: One trace, all picking options
  all channel mode:  All channels for selected stations

  
Most commands are given by pressing one key, however several commands can 
also be given by clicking in the appropriate menu box on top of the screen.
If the full menu is not displayed, select the menu on top right part of the
screen. The following commands are available, first given by the single 
letter command and if also available as a mouse click, the letters in the 
menu box is shown. COMMANDS ARE CASE SENSITIVE.

Channel selection: In multitrace mode, one or several channels can be 
selected by clicking on the station code. Several channels can be selected 
by first clicking on first channel with left mouse button and then cliking 
on last chanel with right mouse button.  If only one channel is selected, 
and toggl (t) to single trace mode is done, a new toggl in single trace mode 
will display all previous channels again.  For the channels selected in 
multi channel mode, it is possible to change to single station 3-component 
mode with y and back again with y. If all channels from all stations shown in
multi trace mode are desired, press u, back again with u or y.
From single channel mode it is also possible to go to all channel mode for that 
station with y and back again with y.
Two channels can be plotted on same trace with different colors. If the channel
below is to be plotted on top the one above, the channel below is selected by putting cursor on
channel and pressing & and then r for repolot.

  
Zooming:  Select a window with the mouse and a zoomed window
          will appear below in single mode and replace the plot
          in multi mode. In Single mode, it is also possible replot
          the zoomed window in place of the original by placing the 
          cursor above the trace when selecting the zoom window. This 
          makes it possible to zoom in the zoomed window. In order to
          go back to the original window in multi mode, do an opposite
          zoom, meaning picking the last point first.
		  
a:        Read amplitude. Position cursor at the top of 
          a wave and press a.  Position cursor at the 
          bottom of the wave and press a. Amplitude(0-p) and 
          period are now stored. These values will be stored 
          with the NEXT phase pick. Amplitude and period are 
          displayed.

A:        Automatic amplitude reading, phase become AMP  or
          read phase AMP but only after using a twice for reading amplitude.           

b:        Filter 5-10 hz, see below

B: Back   Go back one trace in single trace mode
          From eev, multi: Go back one event
          Continous data base: Go back one window

c:        Read coda.

C:        Read end of coda automatically

d:        Delete phase. Position cursor near phase and press d.

d: Del W: Delete waveform file(s), cursor outside area of trace plot, file(s)
          must be in working directory, else no files displayed. If done
          from EEV, only file names in S-file are deleted.

D: Del S: Delete S-file if operated from EEV, multi mode

e:        Phase E

E:        Call external program (defined in MULPLT.DEF) to compute spectrogram.

f: Next:  Single: Go to next channel
          Multi, One event: Go to next event
          multi, continous data base: Go to next window

F: FK:    FK analysis of array data

g: Groun: Make a ground motion seismogram(s).

h: Azim:  Make 3 component analysis (single mode ONLY) to 
          determine azimuth of arrival. Select a window around
          the P-phase on the Z-component. Azimuth and apparent
          velocity  will enter the S-file with the next phase
          reading.

i:        Phase I

I: Iasp   Calculate IASPEI synthetic arrival times, which are then 
          displayed, multitrace only. For teleseismic events
          the IASP91 tables are used, while for local events
          the model defined in STATION0.HYP is used.

j: mb:    Generate a synthetic SP seismogram for reading amplitudes
          for determining mb.

J: mB:    Generate a synthetic BB velocity seismogram for reading 
          amplitudes for determining mB.

k: Ms:    Generate a synthetic LP seismogram for reading amplitudes
          for determining Ms.

K: MS:    Generate a synthetic BB velocity seismogram for reading 
          amplitudes for determining MS.

l: Locat: Locate event, only multi trace mode

m:        Filter 15-24 hz, see below

M: Merge: Merge waveform file, mulplt called from EEV, only if files are
          In working directory.

n:        Filter 10- 15 hz, see below.
 
N:        Toggle multiple windows to show all traces in one screen or
          one of the multiple windows.

o: Oth C: Select other channels 
 
O: Out:   Makes an output waveform file of current
          data on screen. Only multi mode. Response info not saved.
          Standard name with YYYY_MM... is used, name is written in
          text window.

p: Regis: PUT (Register) event in database, you will be 
          prompted for event type and waveform file will be copied
          to WAV.

P: PartM  Particle motion plot, requires the three components in 
          multi trace plot

q: Quit:  Quit program
		  
r: Plot:  Replot same event, useful when screen is cluttered 
          up with e.g. many picks. Also used when a replot is
          wanted with new parameters e.g. filter.

R:        Change radius from epicenter or other selected point from
          which to select stations.

s: Spec   Make a spectrum, single mode ONLY. Press s, select 
          window with cursor, answer questions and the spectrum 
          will appear below with noise spectrum.

S:        Same as s without the noise spectrum, singel trace.

S:        Select station for area selection, only multi trace mode. 

t: Toggl: Toggle between multi and single mode
 
T: OutW:  Output file mulplt.wav of what is on screen
 
u:        Same as 'y' with the difference that all components for all
          stations are shown.

U: Rotat: Rotate components. Backazimuth is calculated from location
          in header or as a second option, taken from observed + azimuth
          residual for respective station. R is plotted instead of N and
          T instead of E. Combining 3 component option (h) with u, the
          user is asked for the backazimuth angle.

v:        Filter 1-5 Hz, see below.

y: AllC:  Toggle to and from all channel mode. All channels are only
          for one station, for more stations use 'u'.

Y:        Pick a theoretical phase if displayed. Place cursor
          where the phase might be. Press y and the program will
          select nearest synthetic phase.

w: WA:    Remove system response and display synthetic 
          Wood-Anderson ground motion in nanometers (nm)
          on next plot (using R or zoom).

W: Oth W: Select other waveform file, same event

z:        Filter 0.001 to 0.1, see below 
x:        Filter 0.1 to 1.0 Hz, see below
Z: <W>    Increase window length in plotting from a continous data base
X: >W<    Decrease window lenght when plotting from a continous data base 
 
>: Print: Will make a hardcopy of all channels of current event with
          the last selected filter, only in multitrace mode.

<:        Same as D

*: Scale: Fixed scaling of trace amplitudes.

Up and down arrows: Increase and decrease amplitude

Horizontal arrows: Scroll

_: Dist:  Select plotting channels in distance order.

:  Resp:  Plot response file, single trace mode only.

TAB: NextW: Next window if multiple windows

Filter options: The fixed filters (4/8 pole Butterworth) are placed 
on keys z,x,v,b,n,m with the following frequencies:

z: 01-.1: 0.01 -  0.1 Hz  Pressing key once gives a 4 pole filter one way
x: .1-1.: 0.10 -  1.0 Hz  Pressing the key twice, and the filter also
v: 1 - 5:  1.0 -  5.0 Hz  go the other way and it is now an 8 pole filter.
;  2 - 4:  2.0 -  4.0 Hz  
b: 5-10 :  5.0 - 10.0 Hz  From menu, only 4 pole filters are used.
n: 10-15: 10.0 - 15.0 Hz
m: 15-23: 15.0 - 23.0 Hz

.: Filt: Variable filter, question of filter limits is given in text 
         window.
,: FixF  Fix filter. If pressed aftrer selecting as filter, the filter 
         remains fixed until pressing ',' again. 
'        Variable filter also with number of poles
&        Overlay, see in beginning of help section.
Phase picking: This is possible in both modes. In Single mode, the phases
               defined are shown on top with some of the options, while
               they are not shown in Multi mode, but have the same 
               definitions.

Combining options: Note that you can select several options together. 
               E.g. V and S will first filter the signal and then 
               make the spectrum. 

Saving observations: When you go to the next trace or another event (F),
               the readings are saved in the S-file. They are also
               saved when you pick the next trace in Multi mode. 

               This is also true for spectral parameters and azimuth 
               determination.
                                                        jh 25-2, 2016
