Drawing Toolbar | Image Enhancement Toolbar | GIS-RS (Advanced) Toolbar

Drawing Toolbar

Note: These tools are hidden by default. They can be toggled using the Edit-> Drawing Toolbar menu entry or from the Toggle->Drawing Toolbar entry on the PopUp Menu.


Edit Nodes Edit node mode is used to add, move, and remove individual nodes making up point, line and area features. To create new features use the point, line and area drawing modes. In order to manipulate the nodes of a feature it is necessary to feature select the feature. Node editing mode only supports selection of a single feature at a time, by LeftButton-Clicking on it. Area selects are not supported. Selecting a feature will highlight all it's nodes at which point one of them can be selected, by left clicking on it. A new node may be introduced into the selected feature by LeftButton-Pressing on an edge, but not too close to a node. The new node may then be positioned by dragging it before releasing. An existing node is selected by clicking on it (or very close to it), at which point the node will be highlighted and filled in. The node may then be dragged to a new location. A node may be deleted by hitting the Delete key.


Rotate/Resize Shape

Rotate/resize mode allows lines, areas and point symbols to be rotated and resized. At this time textual labels and plain points (not using symbols) cannot be rotated or resized. The LeftButton-Click action can be used to select a shape to operate on. Once selected the shape will be drawn with the normal selection styling but a resize/rotate control will also be drawn in red, centered on the shape to be modified. It will look something like this:

The LeftButton-Drag action on the red two-directional arrowhead will rotate the shape in question. A LeftButton-Drag action on the red one directional arrow head will allow scaling the shape larger or smaller. A RightButton-Drag action on either arrowhead will result in a rotation and scaling effect. Rotation and scaling are around a center point for the shape (the crossing point of the two arrows). Rotation and scaling applied to a point symbol result in the angle and scaling parameters being modified. Rotation and scaling applied to a line or area shape result in the actual vertex locations being modified. Note that selecting the boxes around vertex of lines or areas has no effect in rotation and scaling mode. The Escape key may be used to terminate a rotation or scaling drag.


Line Color Select a line shape(s), then click to launch a color mixer from which the line color can be changed. Polygon outline colors can also be changed using this tool.

Fill Color

Select a polygon shape(s), then click to launch a color mixer for changing fill color. To make a transparent fill, set the Opacity to 0.0

Symbol Style

Select a point shape(s), then click to launch the Symbol Properties dialog, from which the point color, symbol and size can be changed.
Make Arrowhead Select a line shape, then click to draw and arrowhead at the terminal end of the line.

Delete Shape(s)

Select a shape(s) for deletion. Shapes can also be deleted using the Backspace or Delete keys.



Image Enhancement Toolbar

Note: These tools are hidden by default. They can be toggled using the Edit->Enhancement Toolbar menu entry or from the Toggle->Enhancement Toolbar entry on the PopUp Menu..

Remove Enhancement

Remove any greyscale enhancement LUT (such as applied by the equalize icon) from the active raster layer. Does nothing if no raster layer is selected in the layers dialog. Note that a linear scaling stretch will still be in effect for non-eight bit data.

Linear Stretch

Perform a linear stretch enhancement.
Histogram Equalize Apply a histogram equalization enhancement to the active raster. This is a non-linear contrast stretch intended to flatten out the post-enhancement histogram. Does nothing if a raster layer is not selected in the layers dialog.

Log Enhancement Perform a logarithmic stretch enhancement. The enhancement is recomputed to map the minimum to zero, the maximum to 255 and intermediate values based on a logarithmic scaling function.

Window Enhancement Re-compute the last enhancement (linear, equalize, logarithmic) based on pixels currently visible in the view.