Click here to select line width of 1, 2, 3, 4, 6, or 8 pixels for use with line selection and drawing tools, profile plots, and Draw Boundary. For other widths see Profile Plot Options dialog.
Cross Hair Tool
Click to mark objects with foreground color and line width. Use Undo to erase mark and delete measurement. Option click to mark with measurement count. X,Y coordinates are shown in Values window and recorded in Results window.
Angle Selection Tool
Click at three vertices to select and measure an angle. Angle is shown in Values window and recorded in Results window. Use Draw Boundary in Edit Menu to draw angle.
Eyedropper Tool
Watch Values window. Click on LUT or in image to change foreground color. Double Click on LUT to change Density Slice color. Option Click to change background color.
Automatic Outlining Tool (Wand)
First choose threshold or density slice mode, or use a binary image. Click inside or to left of an object to select it. Shift Click to extend selection.
Spraycan Tool
Double Click here to change brush diameter. Click and drag to spray random pixels in foreground color.
Profile Plot Tool
Double Click here for Profile Plot Options dialog. Click and drag to create line selection and plot average density. Click and drag in plot window to show source in image window. Shift drag for horizontal or vertical lines.
Text Tool
Click and type to draw text in foreground color. Try Font, Size and Style submenus in Options Menu. Option Click to draw last measurement.
Paint Bucket
Pours foreground color into a closed area. Use Undo immediately if paint leaks.
Look-Up Table Tool
Double Click here to toggle density slicing. Click and drag in LUT window to modify LUT or density slice position and width. Option drag to rotate LUT.
Line Drawing Tool
Click and drag to draw straight line using foreground color and current line width. Shift drag to draw horizontal or vertical line.
Line Selection Tools
Double Click here for Set Scale dialog. Click and hold here for popup menu. Double Click to end segmented line. Try Fill and Draw Boundary in Edit Menu. Use arrow keys to move selections.
Paint Brush
Double Click here to change brush size. Foreground color is shown here. Click and drag to draw using foreground color. Click on LUT or Option click on image to change foreground color. Shift drag to draw horizontal or vertical line.
Freehand Selection Tool
Double Click here for Calibrate dialog. Click and drag to select a closed freehand region. Shift or Option Drag to edit selection. Arrow keys nudge selection.
Eraser
Double Click here to erase entire image. Background color is shown here. Click on LUT or Option click on image to change background color. Click and drag to erase to background color. Shift drag to erase horizontal or vertical line.
Polygon Selection Tool
Double Click here for Measurement Options dialog. Click at vertices of polygon, double click to end. Shift or Option Click to edit selection. Arrow keys nudge selection.
Pencil
Click and drag to draw one pixel wide lines in foreground color. Click on LUT or Option click on image to change foreground color. Shift drag to draw horizontal or vertical line.
Oval Selection Tool
Click and drag to select an oval. Control or Option Drag to edit selection. Shift Drag to select a circle. Arrow keys nudge selection.
Scrolling Tool (Grabber)
Click and drag to scroll image within window. Temporarily select this tool by holding down space bar.
Rectangle Selection Tool
Double Click here to select entire image. Click and drag to select a rectangle. Control or Option Drag to edit selection. Shift Drag to select a square. Watch Values window. Option arrow keys to nudge selection size.
Magnifying Glass
Double Click here or Cmd-U to unzoom. Click within image window to zoom to 2x, 3x, 4x, 8x, 16x, 32x, 64x. Option Click to reduce magnification. Also try Scale to Fit in Options Menu.