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Reverses the effect of the most recent editing or filtering operation. Operations on stacks cannot be reversed using Undo.Cut
Removes the selected rectangular area and copies it to the internal clipboard. Note that Cut, Copy and Paste of images only works with rectangular selections. If text is selected in the "ImageJ" window, it is removed and copied to the system clipboard.Copy
Copies the current rectangular selection to the internal clipboard. If there is no selection, copies the entire active image. The amount of image data copied is shown in the status bar. Cut, Copy and Paste of images to other applications is currently not supported. If text is selected in the "ImageJ" window, it is copied to the system clipboard. The number of characters copied is shown in the status bar. Select the Fill With Clipboard option in the File/New dialog to create a new window from the contents of ImageJ's internal clipboard.Paste
Inserts the contents of the internal clipboard into the active image. The pasted image is automatically selected, allowing it to be dragged with the mouse. Click outside the selection to terminate the paste. Select Edit/Undo to abort the paste operation.Paste Control...
After a Paste, use the pop-up menu in this window to control how the image being pasted is transferred to the destination image. The Paste Control transfer modes are similar to those listed in the description of Process/Image Calculator.
Clear
Erases the current image selection to white. The backspace (or delete) key is a handy shortcut for this command.Clear Outside
Erases the area outside the current image selection to white.Select All
Selects the entire active image, including portions that may be offscreen.Select None
Deactivates the selection in the active image.Restore Selection
Restores the previous selection to its original position. Can also be used to transfer a selection from one window to another.Fill
Fills the current selection with the current foreground color. The foreground color is set by using the dropper tool to "pick up" a new color from an image. Alt-click with any other tool, except the magnifying glass, to temporarily switch to the dropper tool. Colors can be "picked" up from the Image/Colors window without having to switch to the dropper tool or alt-clicking. The dropper tool icon in the tool bar is drawn in the foreground color.Draw
Outlines the current selection using the current foreground color and line width. The "Colors" window, opened with the Image/Colors command, provides a palette of drawing colors. Colors can be "picked" up from the "Colors" window without having to switch to the dropper tool. Use the Edit/Line Width command, or double-click on the line tool, to change the line width.Invert
Creates a reversed image, similar to a photographic negative, of the entire image or selection.Options>
Use commands in this submenu to change various ImageJ user preference settings.Line Width...
Displays a dialog box that allows the width of lines generated by the Draw command to be changed.
JPEG Quality...
Use this dialog to specify the compression level use by the File/Save As/Jpeg command. Requesting a higher degree of compression (a lower value) will produce smaller files, but poorer image quality.Fonts...
Opens a small window with three popup menus for specifying the type face, size and style of the font used by the text tool.
Profile Plot Options...
Use this dialog to fix the Y-axis scale in plots generated by Analyze/Plot Profile.Divide by Zero Value...
Use this command to specify the value used when Process/Image Calculator detects a divide by zero while dividing one 32-bit real image by another. The default is the largest 32-bit real value (3.4e38).Debug Mode
Switches ImageJ in and out of debugging mode. A message is displayed in the ImageJ window indicating the new state (on or off).