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A radio button or option button [1] is a graphical control element that allows the user to choose only one of a predefined set of mutually exclusive options. [2] The singular property of a radio button makes it distinct from checkboxes , where the user can select and unselect any number of items.
Setting or clearing ("unclicking") a checkbox changes the checkbox's state with no other side-effects.Violating this guideline by associating additional actions with the change of state frequently confuses users, because they are used to configuring data in entry controls such as text boxes, radio buttons, and checkboxes and then invoking an action control such as a push button to initiate the ...
type="radio" A radio button. If multiple radio buttons are given the same name, the user will only be able to select one of them from this group. type="button" A general-purpose button. The element <button> is preferred if possible (i.e., if the client supports it) as it provides richer possibilities. type="submit" A submit button. type="image"
PDF Signer is a PDF editor for macOS. [1] [2] This simple PDF editor was specifically designed to fill and sign PDF documents such as agreements and forms without having to print and scan them. It provides the ability to add text and scanned signature images, scribe a signature using the mouse/trackpad, re-order/rotate/delete pages, save back ...
PDF is a standard for encoding documents in an "as printed" form that is portable between systems. However, the suitability of a PDF file for archival preservation depends on options chosen when the PDF is created: most notably, whether to embed the necessary fonts for rendering the document; whether to use encryption; and whether to preserve additional information from the original document ...
The Markup Validation Service is a validator by the World Wide Web Consortium (W3C) that allows Internet users to check pre-HTML5 HTML and XHTML documents for well-formed markup against a document type definition (DTD). Markup validation is an important step towards ensuring the technical quality of web pages.
The check mark is a predominant affirmative symbol of convenience in the English-speaking world because of its instant and simple composition.
The algorithm uses a key pair consisting of a public key and a private key. The private key is used to generate a digital signature for a message, and such a signature can be verified by using the signer's corresponding public key.