Plot/Graph Commands
===================
N       draw new plot
del     delete selected plot
tab     select next plot, shift->tab select previous plot, select all
X       select plot axes (X,Y or both)  {scroll??}
,(<)    select next channel
.(>)    select previous channel
T       increase sample interval, shift->T decrease sample interval, alt->T switch sample/RMS
A       left
S       down
D       right
W       up
Q       decrease rotation
E       increase rotation
Z       zoom in, shift->Z zoom out, alt->Z autozoom ON/OFF
C       center plot ON/OFF, alt->C center point/grid space
F       freeze/unfreeze selected plot
G       select grid (tab selects plots again)
H       hide/unhide selected plot, unhide when all plots selected, hide/unhide grid when selected
P       change point size, change grid point size when selected
L       plot data with lines, change grid lines when selected
=(+)    select previous color
-       select next color
I       show/hide trap mode indicators
V       video ON/OFF
B       clear frame buffer ON/OFF
5       increase transparency (decrease alpha)
6       decrease transparency (increase alpha)
7       decrease contrast bias
8       increase contrast bias
9       decrease contrast gain
0       increase contrast gain

Control Commands
================
Rarrow  increase X-motor position slowly, shift->Rarrow increase fast
Larrow  decrease X-motor position slowly, shift->Larrow decrease fast
Uarrow  increase Y-motor position slowly, shift->Uarrow increase fast
Darrow  decrease Y-motor position slowly, shift->Darrow decrease fast
PageUp  focus Z-motor in slowly, shift->PageUp focus fast
PageDn  focus Z-motor out slowly, shift->PageDn focus fast
Rbrckt  limit pull range right,  Lbrckt  limit pull range left
end	pause pull/relax
home	reverse pull/relax
alt->J  decrease force feedback rate div, shift->J increase force feedback rate div
alt->K  decrease force feedback gain, shift->K increase force feedback gain
alt->R  decrease position feedback rate div, shift->R increase force feedback rate div
alt->M  decrease position feedback gain, shift->M increase position feedback gain
U	start/stop data file, shift->U save preferences
Y	change file-write speed
;	Y-axis-only force feedback
:	both XY axes force feedback (default)

unused keys =  O ' / and most alt-combinations