Hold Ctrl and resize a group with your mouse. The outer boundary of the group will be resized, but the shapes inside the group will not. This is called a non-recursive group resize

Hold Alt and resize a group with your mouse to resize both the group and all of its shapes around its central point

Hold Alt as you move or resize a shape or group of shapes on the drawing canvas to move it smoothly and not ‘snap’ it to an exact alignment based on the editor grid

(as you finish dragging a selection box) Select intersecting shapes

Select/Deselect shapes

Hold Shift and click on or drag a shape from the shape libraries. The new shape will have a white fill and a black outline, as per the original diagrams.net default style for shapes and not a custom default style that you have set

Select a shape on the drawing canvas, hold Shift and click on a shape in the shape library to replace the selected shape. This is faster than dragging a new shape from the shape library over an existing shape to replace it

Select/Deselect shapes

(click on the drawing canvas) Open the context menu

When you have shapes or connectors stacked on top of each other, hold Alt and click on the shape to select the next shape down the z-order stack, behind the currently selected shape

Hold Alt and click on a shape in the shape library to add it to the drawing canvas at the bottom left of your diagram, underneath all other shapes

Hold Shift as you drag the end of a connector and hover over a shape to display only the fixed connection points. Drop the connector on a connection point or at any point inside the boundary of the shape to connect it to that fixed point

(drag the grab handles on a shape) Maintain proportions on resize

Swap two shapes

Hold Alt then drag and drop a shape over a container shape to overlap the two shapes instead of adding them to the container shape

(drag the mouse) Force a selection box, no matter what is selected or what shapes are under your mouse cursor

(drag and drop the end of a connector) Ignore shape

Hold Alt and drag a shape from the library to disable the direction or connection arrows on the existing shapes on the drawing canvas. When you drop the shape, the editor will not try to auto-connect it

Clone a shape

Pan drawing canvas

Move the drawing canvas horizontally

Zoom the drawing canvas in/out

(Select the shape on the drawing canvas that you want to connect a new shape to, then hold this shortcut) Insert and connect a shape

(drag from a blank section on the drawing canvas) Insert horizontal and vertical space and move the nearby existing shapes

Pan drawing canvas

Zoom the drawing canvas in/out