1.2.0

Added

• Keyboard shortcuts work after writing. Writing moved the keyboard's
  focus off the notebook, so Ctrl/Cmd+Z and the other shortcuts stopped
  working until you clicked the page. They now work whenever the notebook
  is the active tab, and Ctrl+Y also redoes. Text fields keep their own
  shortcuts.
• Drag the scroll indicators. On a computer, the scroll indicators at
  the right and bottom edge can be dragged to scroll directly. On a tablet
  they stay a readout, so a hand resting on the edge of the page never
  grabs them.
• Return to the pen. Two optional settings, both off by default, for
  the eraser, lasso, text and shape tools: picking the active tool again
  goes back to the pen or highlighter you used before, and "Return to pen
  after one use" goes back after one eraser stroke, one shape, one text
  edit, or once you are done with a lasso selection (a click outside it, or
  deleting or cutting it).

Changed

• Gentler mouse-wheel zoom. One notch of a stepped mouse wheel with
  Ctrl/Cmd held zoomed by more than 3x, so two notches went from the
  smallest zoom to the largest. Each notch is now at most 15%, and a notch
  back undoes it exactly. Trackpad pinching is unchanged.
• Small SVG pictures stay sharp. An SVG under 64 KB is drawn from its
  vectors, so it stays sharp at any zoom.

Fixed

• The page sidebar works while zoomed in. In a notebook whose pages run
  sideways, tapping another page in the sidebar while zoomed in only moved
  around the page you were on. It now goes to that page, at the same zoom.
• The lasso's colour menu fits on screen. With the custom colour picker
  open, the menu ran off the bottom of the screen and its last controls
  could not be reached. It now stays on screen and scrolls.

Thanks to @Suzkapu for the keyboard
shortcuts, the scroll indicators, the return-to-pen settings, the wheel
zoom and the SVG drawing.