### Volume-Image Window Clicks ###

(1) Left-Click: Select point (rot center, change plane slice)

(2) Middle-Click: Edit main image point to white/fill
      => middle-click-drag edits continuous path to white

(3) Right-Click: Edit main image point to black/remove
      => right-click-drag edits continuous path to black

(4) Shift-Left-Click: Edit main img point to targval if in bounds
      => bounds set by TRUNC entries, targval by PF entry
      => if $im2boundsflag (mid-clk "la") bounds test on im2

(5) Shift-Middle-Click: Dump histogram of 3D sphere
      => set "rad:" in pix, requires gnuplot installed

(6) Shift-Right-Click: Dump single voxel timecourse

(7) Double-Middle-Click: Report underlay pixval
      => and MGH segmentation name/idnum/rgb if loaded

(8) Ctrl-Left-Click (or alt/cmd-z): Undo up to 4 sequential edits

(9) Shift-Ctrl-Left-Click (or alt/cmd-Z): Redo up to 1 prev. undo

(10) Ctrl-Double-Right-Click: This help (ctrl so no accid. edit)


### Volume-Image Window HotKeys ###

R/L arr	slice up/down
up/dn arr	slice up/down (also)
1,2,3,4	resize image window
k	1-time large cursor
K	toggle cursor visibility
O (oh)	toggle open cent cursor (large cursor only)
b	return to single pix brush
B	increase brush radius (wraps at rad=10)
l	go back to last brush size
+,-	brightness up/down ('=' same as '+')
*,/	contrast up/down (times/divide, '8' same as '*')
r	reset contrast=12, midpoint=0.35
Cmd-f	SEND (forward) point
Cmd-g	GOTO point
Cmd-d	toggle surface visibility
o (oh)	toggle stats visibility
i,I	adjust fmid 0.1 up/down
e	save (edit) images
