This topic summarizes mouse and keyboard shortcuts that you can use when drawing and manipulating regions of interest (ROIs).

In all instances, clicking the middle mouse button or scroll wheel will pan around the view.

Drawing Polygons

Select the Geometry tab and click the Polygon button in the Region of Interest (ROI) Tool to draw polygons.

Operation

Shortcut

Select next vertex

Left click

Magic wand

Ctrl + left click

Erase shape

Shift + left click and drag

Define oriented rectangle

Shift + left click and drag after defining two vertices

Right-click menu options for single-part polygons:

  • Complete and Accept Polygon
  • Complete Polygon
  • Clear Polygon

Right-click menu options for multi-part polygons:

  • Complete and Accept Polygon Part
  • Complete Polygon Part
  • Clear Polygon Part

Manipulating Completed Polygons

Operation

Shortcut

Resize

Left click and drag corner handle

Move

Left click and drag center handle

Rotate

Left click and drag center handle in a circular direction

Right-click menu options for single-part polygons:

  • Accept Polygon
  • Clear Polygon

Right-click menu options for multi-part polygons:

  • Accept Multi Part
  • Clear Multi Part
  • Select Part
  • Remove Holes

Drawing Polylines

Select the Geometry tab and click the Polyline button in the Region of Interest (ROI) Tool to draw polylines.

Operation

Shortcut

Select next vertex

Left click

Erase shape

Shift + left click and drag

Right-click menu options for polylines:

  • Complete and Accept Polyline
  • Complete Polyline
  • Clear Polyline

Drawing Other Geometry Types

Select the Geometry tab and click the Rectangle button or Ellipse button in the Region of Interest (ROI) Tool to draw rectangles or ellipses.

Operation

Shortcut

Draw rectangle or ellipse

Left click and drag

Draw square or circle

Shift + left click and drag

Right-click menu options for rectangles and squares:

  • Accept Rectangle
  • Clear Rectangle
  • Rectangle Size

Right-click menu options for ellipses:

  • Accept Ellipse
  • Clear Ellipse
  • Ellipse Size

Drawing Points

Select the Geometry tab and click the Point button in the Region of Interest (ROI) Tool to draw points.

Operation

Shortcut

Add point

Left click

Right-click menu options for drawing points:

  • Accept Points
  • Clear Points

Manipulating Vertices of Shapes

These options are available while drawing shapes, before completing them.

Operation

Shortcut

Move vertex

Move the cursor over a vertex, then left click and drag

Right-click menu options for selected vertices:

  • Delete Vertex
  • Add Vertex Before
  • Add Vertex After

Drawing Pixels

Operation

Shortcut

Select a pixel

Left click

Paint pixels

Left click and drag

Erase pixels

Shift + left click and drag

Right-click menu options for drawing pixels:

  • Add Pixels
  • Delete Pixels

See Also

Region of Interest (ROI) Tool