Selected elements can be moved by dragging in the touch area. Individual objects can be selected / de-selected by (single) tapping them. A double tap in an entry area will end the mode.
Tapping the icon once will undo the last operation. A long press will display a list of the operations since the last save, if you have undone anything a corresponding "redo" action will be displayed. If the undo results in the current selected object being removed you will be returned to the main screen. Some operations consist of multiple simpler actions that will be listed as individual items.
Starts the property editor on the current selection.
Copy the selected objects to the internal copy and paste buffer.
Move the the selected objects to the internal copy and paste buffer effectively deleting them from the data.
Remove the objects from the data.
Merge multiple selected ways resulting in a single way. Ways will be reversed if necessary. This option will only be available if only ways with common start/end nodes are selected, or the selection is two closed ways (polygons), in the later case if the polygons do not have common nodes a multi-polygon relation will be created and the ways added as members. If post-merge tag conflicts are detected you will be alerted.
Add node at intersection
If two or more ways are selected and they intersect witout a common node, a new node will be added at the first intersection found.
Create a relation starting with the current selected elements. The relation type can be selected from a list generated from the available presets. Further objects can be added until the check button is clicked, then the tag editor will be started on the new relation.
Add to relation
Select a relation and add the selected objects as members. Further objects can be added until the check button is clicked, then the tag editor will be started on the relation.
Zoom to selection
Pan and zoom the map to the currently selected object.
Search for objects
Search for OSM objects in the loaded data using JOSMs search expressions.
Upload the selected elements (only available for new or modified elements).
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