5. Toolbar

5.1. Toolbar visibility and position

The visibility of the main toolbar (Fig. 5.1) is toggled on and off using View > Show Main Toolbar.

By default, the main toolbar is docked on the right-hand side. To select a different toolbar docking placement, use File > User Interface Options > Main Toolbar Alignment.

The toolbar can be undocked by hovering the mouse at its top or side edge (cursor becomes a 4-arrow cross), clicking it and dragging the toolbar to a new position. An undocked toolbar can be positioned anywhere in the software window or even outside.

To dock the toolbar, double-click its blue title bar.

Main toolbar

Fig. 5.1 Main toolbar.

Each icon on the toolbar launches an individual tool. Almost all of these tools duplicate commands that are also available via the main menu.

To exit from the tools such as Zoom or Change Width\Level, press Esc.

If the tool opens a dialog (e.g., Calculate Parameter Map or EdgeWave), click OK to start processing or Cancel to exit from the tool.

5.3. Undo / Redo

Undo and Redo features are available via the main toolbar icons. These features are inactive (grayed out: undo/redo) for most commands.

These features become active (undo_active/redo_active) for some of those commands that change the voxel values in the active layer without creating a new layer or document window.

The features do not apply to commands that create new document windows and layers, or create or edit raster ROIs, vector ROIs, or contours.

Several such commands can be found in the Volume > Voxel value conversion > Linear conversion over ROI OR Invert.

The Undo/Redo functionality is illustrated here using Invert as an example:

1. Original image – When the original (Dixon) image is opened in FireVoxel, the Undo/Redo features are inactive.

Original kidney image and histogram

Fig. 5.2 Original image and histogram. Undo/Redo inactive.

2. Inverted image – Select Volume > Voxel value conversion > Invert. The image is inverted and the histogram is flipped around the middle of the interval. Undo feature becomes active. Redo remains inactive.

Result of Invert command

Fig. 5.3 Result of Volume > Invert. Undo active/Redo inactive.

2. Undo Invert – Click Undo undo_active. The kidney image is restored to its original state (before Invert was used) and the histogram is again flipped. The Undo is now inactive, but Redo becomes active.

Result of Undo command

Fig. 5.4 Result of Undo command. Undo inactive/Redo active.

3. Redo Invert – Click Redo redo_active. The image is inverted again, as after the first Invert (Fig. 5.3).