Event Syntax
The bind command uses the following syntax to describe events:
<modifier-modifier-type-detail> <<Event>>
The first form is for physical events like keystrokes and mouse motion. The second form is for virtual events like Cut and Paste, which correspond to different physical events on different platforms. Physical events are described in this section. Virtual events are described in more detail on page 378.
The primary part of the description is the type, (e.g., Button or Motion). The detail is used in some events to identify keys or buttons, (.e.g., Key-a or Button-1). A modifier is another key or button that is already pressed when the event occurs, (e.g., Control-Key-a or B2-Motion). There can be multiple modifiers (e.g., Control-Shift-x). ...
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