science

Tabbing navigation

Tabbing navigation is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Tabbing navigation rather than just read about it. In short: In computing, tabbing navigation is the ability to navigate between focusable elements (such as hyperlinks and form controls) within a structured document or user interface (such as HTML) with the tab key of a computer keyboard. Usually, pressing Tab will focus on the next element, while pressing Shift + Tab will focus on the previous element.

Key takeaways

Tabbing navigation belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Tabbing navigation to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Tabbing navigation from memory before moving on to harder problems.

Reference excerpt

In computing, tabbing navigation is the ability to navigate between focusable elements (such as hyperlinks and form controls) within a structured document or user interface (such as HTML) with the tab key of a computer keyboard. Usually, pressing Tab will focus on the next element, while pressing Shift + Tab will focus on the previous element. The order of focusing can be determined implicitly (based on physical order) or explicitly (based on tab index). In general, tabbing is cyclical, not linear, meaning that the tabbing will cycle to the first/last element when it moves away from the last/first element.

Tab order The tab order of the graphical control elements on a form determines the sequence in which the focus will change when the user strikes the tab key. Usually the tab order is left to right within each row of controls. Not all controls can receive the focus. In Java, labels can receive focus but in Visual Studio they cannot. Also, the TabStop property (in Visual Studio) can be set to false to prevent a control from receiving the focus.

Customization On web pages, by default, tabbing navigates through form fields (such as text entry) and anchors (such as links) in the order they appear in the character stream (i.e., in the raw HTML). This can be overridden by the page author using the tabindex attribute, or by disabling a form field. At the client end, OS X defaults to only focusing text boxes and lists, but this setting can be overridden to allow navigation to all entries (see references). Mozilla Firefox can similarly be customized to include or exclude navigation to text areas, other form elements, and anchors.

Alternatives Most desktop applications and web browsers support this kind of keyboard navigation. But in some web browsers like Opera, an alternative method known as spatial navigation is used. This method, in many cases, avoids many key presses. In addition, Mozilla Application Suite and Mozilla Firefox support caret navigation, which provides a more natural way of document navigation similar to mouse navigation.

See also Spatial navigation Caret navigation

References

External links HTML 4: 17.11 Giving focus to an element / 17.11.1 Tabbing navigation – standard Mozilla Keyboard Navigation: Tabbing accessibility.tabfocus – preference field for customizing tabbing navigation How to tab focus onto a dropdown field in Mac OS X – discusses preference in Apple Menu > System Preferences > Keyboard & Mouse > Keyboard Shortcuts Why Doesn't Tab Work for Drop-down Controls in Firefox on OS X?

Worked examples

Example 1 — a first encounter with Tabbing navigation

Start with the simplest possible case. Write down what Tabbing navigation claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Tabbing navigation before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Tabbing navigation ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Tabbing navigation

In research: Tabbing navigation appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Tabbing navigation in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Tabbing navigation is common in secondary-school and first-year university syllabi. It links to neighbouring topics Text editor features, User interface techniques, so understanding it makes those chapters shorter.
In everyday life: Look for Tabbing navigation outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Tabbing navigation in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Tabbing navigation means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Tabbing navigation out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Tabbing navigation in simple terms?

Why does Tabbing navigation matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Tabbing navigation?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Tabbing navigation.