6.8.1   Tool Bar

 

Clear the graphics window and its history.

 

Switch to select mode. In this mode, you can select regions or XLDs that are displayed in the graphics window. A selected item is highlighted with a dashed border. If multiple layers of region/XLD data are displayed in the graphics window, the first click selects the uppermost region/XLD under the mouse cursor. Each subsequent click at the same position selects the region/XLD below the currently selected item. The variable name of the selected item is displayed in the title bar of the graphics window for reference.

You can use the select mode to inspect gray value histograms and features of individual regions or XLDs.

In the example image illustrated in figure 6.10, the displayed image of a pizza is overlaid with region data. A single region is selected.

 

Combined move/zoom tool. Drag the displayed image with the left mouse button to alter the displayed portion.

 

Magnifying glass. Click into the graphics window to magnify the area at the mouse cursor.

 

Zoom in. Click the small arrow next to the icon to switch to zoom out.

 

Zoom out. Click the small arrow next to the icon to switch to zoom in.

 

Set image size. The value can be selected from the menu attached to the small arrow. Additionally, the resizing behavior can be selected.

The following values for image scaling are available:

• Fit

  Scales the image to completely fill the graphics window.

• 400 %, 200 %, ...

  A list of fixed percentages scales the image with respect to its natural size.

• Double

  Double the current image size.

• Half

  Half the current image size.

• Aspect Ratio 1:1

  Scales down the image size, so that its aspect ratio is maintained.

You can also change the size of the graphics window, for example, by “gripping” the window border with the mouse. Then you can resize the window by dragging its border. After this size modification the window content is redisplayed, depending on the chosen resize mode.

The following modes to control the resizing behavior of the image are available:

• Full Stretch

  The visible image part remains constant. The zoom levels are adapted to fully fit the previous view into the new window size. The aspect ratio of that image part might be skewed.

  This is the classic mode. Graphics windows that are opened via operator dev_open_window will be opened as floating windows using the “Full Stretch” mode for maximum backwards compatibility.

• Keep Aspect Ratio

  The zoom level is changed to preserve the previous aspect ratio. The visible image part can change in one axis as a result of the resize operation.

  This is the default mode. You can change the default mode under Edit ▹ Preferences ▹ General Options.

• No Stretch

  The zoom level remains fixed. Thus, resizing the window will show a correspondingly larger or smaller portion of the image.

 

Set window size. Clicking this icon sets the window size to the shown value. The value can be selected from the menu attached to the small arrow. Double and Half change the size to half and double its current window size, respectively. Aspect Ratio 1:1 scales down the current window size, so that the aspect ratio of the displayed image is maintained.

 

Draw ROIs and XLDs interactively; see section “ROI Window”.

 

Toggle 3D plot mode; see below.

 

Active graphics window.

 

Non-active graphics window. Click the icon to activate the corresponding graphics window. Only one graphics window can be active at a time.

If you want to specify display parameters for a window, you can select the menu item Visualization in the menu. Here you can set the appropriate parameters by clicking the desired item (see section “Menu Visualization”). The parameters you have set this way are used for the active window. The effects of the new parameters will be applied directly to the last object of the window history and alter its parameters only.