Measurements Table

move the first point without actually closing the path, press the Alt key while clicking it.

The Rectangle

and Ellipse

tools place a 10x10 pixels size rectangular or elliptical shape on the image (that size may be modified at Preferences tab). To move or resize the measurement click the shape control points. If the SHIFT key is pressed while resizing the shape it will have exactly the same width and height, so it will become a perfect square or a circle.

To scroll up/down or left/right the image while making a measurement, press the spacebar to turn on temporarily the

Hand Grabbing Tool.

To write the measurement right click and select Write measurement, or choose Unselect (Cancel) if you want to cancel it.

Some tools can be work in different ways depending on its settings. To define how tools work right click on the tool you want to configure, or just select the Edit > Preferences menu command to open the Preferences window.

Tool		Options	Description
	Angle Measurement Tool		The Angle tool allows you to determine the angle defined by three points within the digital image. Angles are drawn by clicking on three points: on one point subtending the angle, the vertex and the second point on the rays subtending the angle to be measured. Place the cursor over the initial point (1), click, point to the angle center (2) and click other time, point to the final point (3), and click again. To write the measurement right click and choose Write measurement. If End segment and angle measurement automatically is set ON in Preferences window, the measurement will be written automatically as soon you click for a third time.
	Line Measurement Tool	CF	The Line tool allows you to determine the distance defined between two points within the image. To draw a single-segment line, click at one end of the line, point to the other end and click again. To write the measurement right click and choose Write measurement. If End segment and angle measurement automatically is set ON in Preferences window, the measurement will be written automatically as soon you click for a second time.
	Manual Tags and Counter Tool		The Manual Tag and Counter Tool allows counting manually objects within an image. Each time you click on an image point, it is tagged using a colored pixel and the total counting is incremented by one. Each tag is stored in the Measurements window and numbered accordingly to the counting. To change the actual counting right-click .
Manual area/perimeter measurement
	Polygonal Area/Perimeter Measurement Tool	S, CF, H, CO	Click on the first point, and continue moving and clicking until you have marked all segments. To measure a polygonal area click on the first point at the end of the measurement in order to close the polygon. To write the measurement right click. NOTE: Important notice about irregular selections.
	Rectangular Area Measurement Tool	S, CF, H, CO	Drag on the image to select a rectangular area. You may adjust the boundaries and position of a rectangular selection while it is active. To adjust a boundary, place the cursor along the edge or corner of the rectangle selection and drag it when the 2-way cursor appears. To move the rectangle selection, place your cursor in the middle of the rectangle and drag it when the 4-way cursor appears. To write the measurement right click and choose Write measurement. The Rectangular Area Measurement Tool supports Basic Statistics and Frequency Analysis and Histogram.
	Elliptical Area Measurement Tool	S, CF, H, CO	Drag on the image to select an elliptical area. The selecting is drawn from the center. To move the selection, place your cursor in the middle of the rectangle and drag it when the 4-way cursor appears. To write the measurement right click and choose Write measurement or Write measurement and extended information. The Elliptical Area Measurement Tool supports Basic Statistics and Frequency Analysis and Histogram. NOTE: Important notice about elliptical selections.
Automatic selection area measurement
	Automatic Area Measurement Tool	SS	Makes automatic selections of pixel areas with similar color. Click the color you want to select. A mask will mark the selection. To modify the selection scope and modify other related settings, open the Selection Settings palette.

The following buttons are not measurement tools but perform other useful functions:

	Tool/Menu	Measures
Manual Measurements included in the Tools Palette	Straight Line	Length, Control Points coordinates
	Angle	Angle, Length, Control Points coordinates
	Polygon	Perimeter, Area, Control Points coordinates
	Rectangle	Perimeter, Area, Control Points coordinates
	Ellipse	Perimeter, Area
	Manual Tag and Counter	Control Point coordinates
Semi Manual Measurements	Automatic Area (also in the Tools Palette)	Area, Control Point coordinates
Semi Manual Measurements	Find Objects	Objects Area, Number and Statistics
Automatic Measurements	Statistics	Statistics can be calculated from: Images Measurements in the Measurements window See Measurements Statistics Measurements in the Results window See Results Statistics
	Statistics

	Line Selection Tool	Use the Line Selection Tool to edit measurements previously done with the , , , or tools. To select a measurement click on any of its lines, after the measurement is selected its lines can moved or stretched. To write the measurement (replacing the previous measurement by the modified one) right click and choose Write measurement. To cancel all modifications and keep the previous measurement, right click and choose Unselect (Cancel). Note: To modify a measurement done by the tool you should select it in the Measurements window.
	Color Picker Tool	Use the Picker Tool to set the foreground color. Click the color you want to pick.
	Freehand Pencil Tool	Use the Freehand Pencil Tool to paint over the image.
	Hand Grabbing Tool	Scrolls an image in any direction when the whole image is bigger than the image window. Note: Pressing the spacebar turns on temporarily the Hand Grabbing Tool without interrupting the measurement in progress.
	Zoom Tool	Enlarges or reduces your view of the image depending on which mouse button is clicked. Right-click enlarges and left-click reduces the zoom.
	Foreground/Background Color	Click on the Foreground (left box) or Background (right box) boxes to open the color window to select a new color. The Foreground color determines the color used to draw the new measurements, although after a measurement is done, its color can be modified at the Measurements window. The Background color is also used when a selection is transferred another window. Learn more: Important notice about transferring selections.
	Brush size	The brush size affects the tool and also the tool (when adding/subtracting selections manually).
	Selection Lines color	If selected the selection lines will be drawn using the Foreground/Background colors. It unselected they will be drawn in black and white colors. This option doesn't affect the color used to draw the lines on the Measurement Layer.