Keyboard operation

Credo Reference has been designed to be used with either keyboard or mouse commands. This section describes how to operate the various features of Credo Reference using the keyboard.

Tab and Shift-Tab Keys

The tab (and shift-tab) keys allow you to move to each link or form element. As you press tab, the focus will move forward through the links. Shift-tab will move backwards. The last tab stop will cycle back to the first tab stop as you keep pressing tab. Information overlays (such as book and entry summaries) that are normally shown when hovering the mouse over a book or entry link are also shown when the link receives focus via the tab key. When a link has focus, press enter to follow the link. Some links in Credo Reference are actions that are performed within the page being shown, for example links that expand or contract a hierarchical display of other links.

Access Keys

Access keys are assigned to each main menu link to allow navigating via key commands. In Internet Explorer, use Alt (on a PC) or Command (on a Mac) plus the access key. In Firefox use Alt plus Shift plus the access key to invoke a command via its access key.

Access Key Link
j Skip to content
s Search
a Advanced Search
b Find a Book
c Concept Map
r Saved Results
g Gadgets
h Help
l Logout
e E-mail (on an entry display)
p Print (on an entry display)

Notes on Access Keys

1. Some browsers will set the focus to the link assigned to the access key. In this case, you need to press enter to follow the link. Other browsers will automatically follow the link.
2. If you are using an assistive technology, it may have already assigned a function to one or more of these access keys. In this case, the preassigned function will usually prevail.

Form Elements

When focus is on a checkbox, press spacebar to toggle the check.
When focus is on a selection list, such as the subject selections offered on the search form, use the up or down arrow keys to change the selection.
When focus is on a radio button group, the left or right arrow keys will move the selected button.
Dynamic Tables and Timelines

Dynamic tables and timelines are a feature of some books that allow you to add columns to a table to allow side-by-side comparison of different data groups within the entry shown. When operating a dynamic table, the column choices are made through a select list. Use tab to move the focus to the select list. Use the down or up arrow to cycle though the column options and then press enter to add the chosen column to the table. To remove a column, tab to the 'hide' link in the column's header and press enter.

Concept Map

The Concept Map is a graphical presentation of entries related to a search term. The map contains a set of linked nodes. The nodes contain an entry heading. Each node is connected to other nodes that are related to that node. Java must be enabled to use the Concept Map. After doing a Concept Map search, the page will show a graphical user interface for manipulating the map. The Concept Map can be operated with the following key commands.

Use Tab to navigate through the different windows and controls. There are three controls. One for zooming the display, one for rotating the display and a third for adjusting the link levels. There are two other windows, the main window with the concept map and another window with a list of visited nodes.

Zoom Control

Press up arrow to zoom in.
Press down arrow to zoom out.
Rotation Control

Press up arrow to rotate clockwise.
Press down arrow to rotate counter clockwise.
Link Levels Control

Press up arrow to increase levels.
Press down arrow to decrease levels.
Visited Nodes List Window

Press up arrow to move up one item.
Press down arrow to move down one item.
Press Enter to select the item. This will redraw the map with this item as the center node.
Main Concept Map Window

Press the up, down, left or right arrow to pan the map.
Press n to move to the next node in breadth first search order. If no node is yet selected, start at the center node.
Press p to move to the previous node in breadth first search order. If no node is yet selected start at the final node.
Press Enter to select a node. This will redraw the concept map with the selected entry as the center node.
Press Shift to open an entry summary pop-up window for the current node.
Entry Summary Pop-up

Press Enter to open entry. This opens the entry display in a new window.
Press Shift to close the pop-up.