Move and resize shapes in the preview
The preview could show you a shape's code and delete it, but moving or resizing anything meant editing numbers by hand. Now you can drag a shape to move it and drag its handles to resize it, and the change is written into the code the way you would write it yourself: a circle's cx and r, a rectangle's x and width, a traced path's translate. The rest of the file stays exactly as it was, and one Ctrl+Z undoes a whole drag.
Drag a selected shape to move it, or one of the eight handles around it to resize it. Hold Shift to keep its proportions, and press Esc during a drag to put it back.
The arrow keys move the selected shape by one unit, and by ten with Shift.
Clicking walks into groups: the first click selects the whole group a shape belongs to, and each further click goes one level deeper, down to the shape itself.
Shapes without a position of their own, such as paths, groups and text, are moved and resized with a transform, and a second resize updates that transform instead of adding another.
Del removes exactly the selected element from the code, even when it shares a line with other elements.
Once the drawing is larger than the pane, Ctrl and the scroll wheel zoom toward the pointer, so the spot you are looking at stays under it instead of drifting away.
In a file with markup commented out, clicking a shape could select a different element in the code.
Zooming into a drawing sized 100% with no viewBox, as Visio exports are, now magnifies it instead of only making the canvas bigger.