Polar: a dotted guide appears when the rubber band is near a tracking angle; type a distance to go along it. Ortho and polar exclude each other. Tracking: rest on a snap point for a moment to acquire it (+), then line up with it horizontally/vertically — where two paths cross, the point snaps. Esc clears acquired points. Dynamic input shows the console's fields next to the cursor (Tab = next field, Enter = accept). F11/F12 belong to the browser, so tracking is F6.

Object snaps All on All off

Touch and pen

Finger: tap = click, drag = selection window, two fingers = pinch zoom and pan, long-press = right-click menu, double-tap = double-click. While a point is asked for, drag to aim (snap preview and loupe) and lift to place it. Pen: works like the mouse, hover included; the barrel button = right-click.

One-shot override: type end, mid, int, cen, qua, per, tan, nea, ext, par, app, gce, nod, non, m2p or from when a point is asked for, or Shift+right-click. Extension: pass over a line end (a small + marks it), then follow the dotted line. Parallel: while drawing, touch a line, then move roughly parallel to it. 2400<30 / @2400<30 = length<angle. Snap settings are remembered in this browser.

Units

Typed lengths use the drawing unit. Add a unit to override it, e.g. 2.4m, 240cm or 2400mm. Grid size and snap step are always in mm.

Tip: the function keys toggle these any time. Grips appear on a selected shape — drag a corner to reshape it.