explorer 220 shortcuts

docs-2.0/nebula-explorer/ex-ug-shortcuts.md

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+# Basic operations and shortcuts
+
+This topic lists the basic operations and shortcuts supported in Explorer.
+
+## Basic operations
+
+| Operation             | Description                                                         |
+| ---------------- | ------------------------------------------------------------ |
+| Move a canvas         | Hold down left click and drag the canvas.                              |
+| Zoom in or out the canvas    | Mouse wheel scrolls down to zoom in and up to zoom out. |
+| Select one single vertex or edge | Left-click a vertex or an edge.                                       |
+| Select multiple vertices and edges | Hold Shift and left-click vertices and edges.         |
+| Batch selection     | Hold down right click and frame vertices and edges; Or Hold Shift and hold down left click, and then frame vertices and edges.  |
+| Move selected vertices     | Left-click the selected vertices and then move them.                                      |
+
+## Shortcuts
+
+| Operation | Description |
+| :-- | :--|
+| Enter | Expand |
+| Shift + '-' |	Zoom out |
+| Shift + '+' | Zoom in |
+| Shift + 'l' | Display |
+| Ctrl/Cmd + 'z' | Undo |
+| Ctrl/Cmd + Shift + 'z' | Redo |
+| Ctrl/Cmd + 'a'| Select all vertices.|
+| Selected + 'del'| Hide the selected elements. |
+| Selected + Shift + 'del' | Hide the unselected elements. |