Using mouse for editing

TpX hot keys could be learned from the main menu. However, some editing tasks could only be done with mouse. The list follows:

• Click object  Select object (current selection would be lost)
• Shift-click object  Add object to selection (current selection would be maintained)
• Drag object  Move object
• Drag control point  Move control point of selected object to reshape it
• Ctrl-click mouse  Add/delete control point of selected object