The toolbar in the sidebar now includes a globe symbol. It will show information about the current view and highlight the view center with a crosshair.
When activating GPS location, your location will be highlighted. Also, details will be included in the toolbar panel.
The details of map features show geographic information about the object: coordinates, length and area (when applicable).
In the Options you can configure coordinate formats and unit systems.
Also, in the Options you can select which editor will be used, when clicking the 'edit' button in a map feature popup.
A current update allows symbols to use the scale of the current map view for parameters (e.g. for width or offset of lines). To demonstrate these features, the "Railway gauge" category now shows the rails with the correct offsets (although the exact configuration for multi-gauge rails is neither mapped nor evaluated) (available from zoom level 18). Code.
Right before SOTM I published a little update, which improves the wikimedia integration: