New doc setup for digital doc editing:
    Change zoom to 1:1 so raster image scale is right.  Just type:  1
    File / Document Properties, Page tab.
       Deselect all Border settings
    Edit / Guides Around Page   so you can see (0,0)
    You will still have to scroll to get (0,0) at lower left :(

To move an Object precisely, select object and Object / Transform,
deselect the Relative move checkbox.

To move anything (incl. entire drawing) to standard (0,0) location, select
whatever you want and move to (0,0) using procedure of previous item.

http://www.inkscape.org/doc/tips/tutorial-tips.html
Has a section on Icons.  Available online in the tips&tricks tutorial.

Zoom 1:1 means natural screen pizels, so will be same size as if rendered
with "display" or a browser.

Coordinate system for the page, and for each object, is (0,0) at BOTTOM left
(different from web and raster images).
(0,0) in inkscape is the bottom left of exports.
Can not get the damned thing to show with (0,0) at top left.


See http://inkscape-forum.andreas-s.net/topic/133909 about 16-bit support
work-arounds.

Awesome videos:  http://www.learndigitaldesign.com/school.php?title=1

Shift ADDs to selection.

Select a shape, then Alt-arrow</+- to manipulate at rate determined by current
zoom.

Can "Group" objects by Ctrl-G when they are selected (Ctrl-U to un-group).
Can still individually select components with Ctrl.

COLORING.  Ctrl-Shift-F allows you to set fill color + border.
Ctrl-F1 is Gradiant

Pgup/Pgdn/Home/End change Z axis order.
Tab, Shift-tab cycle through objects in Z order.
Also the toolbar buttons that look like paragraph justification buttons.


Curving text.
Select path and a line.  Menu Text / Put on Line, or similar.

CTRL+"d" duplicate.

Stroke & Fill, X the stroke to get stroke off of shapes.

PATHS = Free Hand and Bezier Objects
    One such Object may contain multiple disconnected segments.
    There are operations to combine and separate the disconnected segments.


TOOLS
    Select + Transform tool
        Must LMB click right on something drawn, not on blank space inside an
        object.
        After selected RMB menu.
        Select object AGAIN (or maybe inside???) and the handles turn into
         rotate/skew handles, and a + for the origin (for rotation).
        Lock in form locks aspect ratio.
        I think can click and drag around multiple objects
    Bezier  (aka "Pen").  PATHs (have Nodes)
        LMB (not drag) connected straight-line-segments.  RMB to the connection.
        LMB&drag for curves.
        LMB (RMB?) inside of a Bezier point handle to make an enclsed shape.
        ENTER to stop a line?
        Can definitely "fill" an unclosed shape.
        It will just fill along the open edge without a stroke.
    Freehand.  PATHs (have Nodes)
        LMB, LMB makes a single, standalone straight line.
        Click & drag makes a single, standalone curved line.
        HOWEVER, can "add segments ONTO" by putting the start LMB on a square
         line-segment end-handle.  Similar to close the shape.
        AND can add separated segments to a Freehand Object with SHIFT+LMB.
    Calligraphy  (also aka Pen???)  Not PATHs (i.e. no Nodes)
        Is more like a shape than a line.
        Can edit path nodes, stroke, fill, etc.
    Rect
        Author implies that the Stroke/Fill settings to right are tool defaults,
         and the same settings down bottom are object-specific.
        Use "Change:" form up top to set exact width and height
        You get an "extra" round resize handle for rounding (this turns into 2
         for asymmetrical rounding).
        Lock in form locks aspect ratio.
    Edit Path by Node
        Can convert shapes to paths with a toolbar up top.
        Can move and curve both modes and line segments.
        Can straighten between 2 nodes by SEL, SHIFT+SEL, Connect. icon in bar.
        Can add new curvies similarly.
        Double-click will add a node.
    Circle
        Extra round handle is for making arcs.
    Star tool is very flexible, handling rounding, etc.
    Tweak
        Sculpting functions, magnet, pull/push-lines to/from one another.
        Roughen is like subsurf with offsets.
        Color stuff.
    Gradient editor.
        Top form has an Edit button where you can change everything.
        Can click&drag the stops (beginning and end vertexes/nodes).
        Can add as many new stops as desired with arbitrary colod&alpha.
    Zoom
        Lots of stuff to maximize objects-of-interest in the Inkscape window.
    Text
        ALT+any-arrow-key to adjust letter positions.
            <> whole thing, [] rotates.
        Need the Text icon from the Command Bar to adjust.
        To resize without changing font size, use the menu bar lock.
    Color picker
        ?Color picker seems to apply to the open Fill/Stroke item?????
        Seems to pick through layers
        seems to ignore opacity/alpha

TEMPLATING
    Turn down opacity of template object.
    Lock the object.
    Graphics tablet useful.
    Trace each object object and line with bezier curve.
    Do not need to curve much.
    To not close a bezier, end it with ENTER.
    The objects can overlap.
    Chicken example objects:
        body
        red comb
        yellow beak
        eye
        pupil
        lip-line
        wing-line
        leg/feet.
    Dup body parts that need shadowing and add a gray gradient on the shadow
     side.

CTRL to restrict movements to Y or X axis.
CTRL locks aspect ratio for resizing (scaling).

CTRL+a selects all IN LAYER
ESC de-selects all

To align or adjust multiple items, use the bar-graph looking icon in the
 Command Bar.

Use ALT w/ mouse-clicking to cycle through overlapping objects.

New items are always added to the CURRENT layer.



SVG Output
Inkscape native (doc created in Inkscape)
    By default puts all objects into a top-level <g id="layer1"/>
    Inkscape Circle/Ellipse/Arcs all saved as SVG <path>s.
Imported
    No layers whatsoever (unless you create layer as documented below).
    New objects are created inside the root <svg>.
Layers are just <g>'s with attr inkscape:groupmode="layer".
If you add that attr without an inkscape:label attr, there will be no layer
label and the Inkscape layer panel will show it with the id as the name.
As soon as there is 1 layer in the document, Inkscape will only add new objects
to the "active layer", defaulting to the first layer there is (probably).
Z ordering is simply the sequence of peer objects in the same grouping.
To PgUp, e.g., just moves that object to lower in the .svg file.