Region of Interest Shortcuts

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