wxGUI/vdigit: update manual

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@54409 15284696-431f-4ddb-bdfa-cd5b030d7da7

gui/wxpython/vdigit/g.gui.vdigit.html

@@ -8,40 +8,45 @@ component intended for interactive editing and digitizing vector maps
 vector editing GRASS capabilities).
 
 <p>
-The digitizer supports editing of 2D vector features (points, lines,
+Note that only vector maps from the current mapset is possible to open
+for editing.
+
+<p>
+The digitizer allows editing 2D vector features only (points, lines,
 centroids, boundaries, and areas).
 
-Vector features can be selected by mouse or by query (e.g. minimal
-vector line length). Vector features can be selected by bounding box
-or simply by mouse click (based on 'Settings&rarr;General&rarr;Select
-threshold' value).
+Vector features can be selected by mouse (bounding box or simply by
+mouse click, see select threshold
+in <i>Settings&rarr;General&rarr;Select threshold</i>), or by query
+(eg. by line length, see <i>Settings&rarr;Query Tool</i>).
 
 <p>
-Vector digitizer can be activated from Main toolbar in Map Display by
-selecting "Digitize" from "Tools" combobox. Vector map to be edited
-can be afterwards selected from digitizer toolbar ("Select vector map"
-combobox, note that only vector maps from the current layer tree in Layer
-Manager are available).
+Vector digitizer can be launched from Map Display toolbar by selecting
+&quot;Digitize&quot; from <i>Tools</i> combobox. Vector map is
+selectable for editing from Digitizer toolbar (&quot;Select vector
+map&quot; combobox, note that only vector maps from the current layer
+tree in Layer Manager are listed).
 
 Vector digitizer can be alternatively also activated from contextual
 menu in Layer Manager by selecting "Start editing" on selected vector
-map in the layer tree.
+map in the layer tree, or directly from Layer Manager
+toolbar <img src="icons/edit.png" alt="icon">.
 
 <p>
 New vector map can be easily created from digitizer toolbar by
-selecting "New vector map" in "Select vector map" combobox. A new
-vector map is created, added to the current layer tree in Layer
-Manager and opened for editing. "Select vector map" combobox in
-digitizer toolbar also allows switching easily between vector maps to be
-edited.
+selecting &quot;New vector map&quot; in &quot;Select vector map&quot;
+combobox. A new vector map is created, added to the current layer tree
+in Layer Manager and opened for editing. &quot;Select vector map&quot;
+combobox in digitizer toolbar also allows switching easily between
+vector maps to be edited.
 <p>
-The wxGUI vector digitizer draws all maps in the Layer Manager in the Map 
-Display window; in addition, the digitizer also recognizes a special 
-"background" vector map. This map is selected from the Layer Manager by 
-right-clicking on the map and selecting "Use as Background Map" from the
-contextual menu. The features of the background map may then be copied into
-the currently edited vector map using the "Copy features from (background) 
-vector map" button in the "Additional Tools" menu on the Digitzer Toolbar.
+Vector digitizer allows to define &quot;background&quot; vector map. A
+background map can be selected from map layer contextual menu in Layer
+Manager (&quot;Use as Background Map&quot;). Newly digitized vector
+features are snapped in the given threshold to the features from the
+background map. Vector features may be also copied from the background
+map by &quot;Copy features from (background) vector map&quot; tool
+from the digitizer toolbar.
 
 <h3>DIGITIZER TOOLBAR</h3>
 
@@ -203,7 +208,7 @@ vector map" button in the "Additional Tools" menu on the Digitzer Toolbar.
 
   <dt><img src="icons/settings.png" alt="icon">&nbsp;
     <em>Settings</em></dt>
-  <dd>Dialog for vector digitizer settings.</dd>
+  <dd>Digitizer settings.</dd>
 
   <dt><img src="icons/quit.png" alt="icon">&nbsp;
     <em>Quit digitizing tool</em></dt>
@@ -214,9 +219,9 @@ vector map" button in the "Additional Tools" menu on the Digitzer Toolbar.
 
 <h2>NOTES</h2>
 
-<dl><dt><b>Mouse button Functions:</b><dd>
-	<dt><i>Left</i>   - select/deselect features</dt>
-	<dt><i>Control+Left</i> - cancel action/undo vertex</dt>
+<dl><dt><b>Mouse button functions:</b><dd>
+	<dt><i>Left</i>   - select or deselect features</dt>
+	<dt><i>Control+Left</i> - cancel action or undo vertex when digitizing lines</dt>
 	<dt><i>Right</i>  - confirm action</dt>
 </dl>
 
@@ -233,9 +238,9 @@ existing vector features (Settings&rarr;General&rarr;Snapping). To
 disable snapping set the snapping threshold to '0'.
 
 <p>
-If the digitizer crashes for some reason you can repair the vector map
-which was left open with
-the <em><a href="v.build.html">v.build</a></em> module.
+If the digitizer crashes for some reason, the changes are
+automatically saved. Broken topology can be repaired by running
+<em><a href="v.build.html">v.build</a></em>.
 
 <h2>REFERENCE</h2>