Keyboard Navigation

Move right (forward) through project by Grid space 

Left or Right Arrow Move timeline cursor back or forward 

Ctrl-i-Left or Right Arrow Jump to previous or next marker 

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As with Keyboard Navigation, these shortcuts allow you to make selections on the timeline without using the mouse. Almost all of these shortcuts are the same as the Keyboard Navigation shortcuts with the addition of the Shift key. Many of these shortcuts also work in the Chopper and Track Properties windows. 

Many Keyboard Navigation and Selection shortcuts also work in the Chopper window, in addition to some playback (transport) controls and zoom shortcuts. 

Access for All Citizens. The Citizen s Helper stack also tries to accommodate the most naive micro-computer user. At the first screen, the user need only be able to find the return key on the keyboard in order to transfer to a card that explains about moving the mouse and clicking its button, working with scrolling text fields, and other features of HyperCard. For the first several cards, it is only necessary to move the mouse s on-screen image to a particular part of the screen in order to proceed to the next card. The experienced user is offered alternative ways of achieving purposeful navigation. 

The SRS 3D Viewer [28] is part of the SRS 3D server at the European Bioinformatics Institute (EBI) site (http //srs3d.ebi.ac.uk). Similar to Cn3D, SRS 3D is intuitive and easy to use. It enables the user to easily find all related structures, select one, and immediately see where the target sequence aligns onto the 3D structure (fig. 11.2B). Key differences between Cn3D and SRS 3D are that SRS 3D shows sequence features from the UniProt, InterPro, and PDB entries of the target sequence and enables users to easy map these features onto the structures (fig. 11.2C). SRS 3D also has a richer set of mouse and keyboard commands to help navigate and select parts of the sequence and structure. However, a drawback of the SRS 3D Viewer is that it can be difficult to install on some computers. SRS 3D is a commercial product but can be used freely via the Web to view any 3D structures in the PDB. 

Many ergonomic ailments occur in the soft tissues of the wrist and forearm, as continuous computer use subjects workers to repetitive motions and sometimes awkward positioning. Computer mouses are ergonomically designed to minimize worker injury, and the no-hands mouse uses foot pedals to navigate. Ergonomically friendly computer keyboards are also available. 

Figure 1.2 shows the View menu. To view the Explorer Window, for example, press Alt +1 simultaneously. If you look at the View > Show Envelopes > Volume menu item, you ll notice the V next to it indicating that all you need to do is press V as the hotkey shortcut to do the same thing. While most menus can be navigated in ACID using keyboard shortcuts, only a limited subset of commands have hotkeys that can be executed without navigating menus. 

To instantly navigate to a marker, press one of the number keys at the top of your keyboard (not on the number pad). Markers can be quickly named (and renamed) with a short note or name more clearly identifying its purpose. Right-click a marker and, from the context menu, select Rename or double-click the marker. Then you can type or edit the name. Click away from the marker or press the Enter key to finish. Names are for your reference only. Figure 3.2 shows a number of markers used to identify the Verse-Refrain structure in a song. 

The following is a comprehensive list of shortcuts and keyboard accelerations available in ACID. While it is not necessary (nor even possible for normal humans) to memorize this entire list, you should always remember that ACID utilizes keyboard shortcuts extensively. If you find yourself using the mouse to push buttons or navigating the same set of menus and submenus again and again, it is probably a good guess that there is some type of shortcut associated with these actions. 

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