- **Thickness** defines thickness of coordinate plane borders; \r
- **Rotate to plane when selected** check-box turns on/off automatic switch the viewer to the top view for the selected sketch plane. \r
- **Angular tolerance** defines defines an angular tolerance for automatic creation of horizontal and vertical constraints;\r
+- **Default spline weight** defines default weight for B-spline nodes during creation. The default value can be changed by editing of the spline;\r
+- **Cursor for sketch operation** defines a cursor which indicates a launched sketcher sub-operation.\r
+- **Create sketch entities by dragging** defines a style of sketche etities creation. It concerns creation of lines, rectangles, circles, arcs, ellipses, elliptic arcs. If it is switched ON then points of objects has to be defined by mouse press - mouse move - mouse rellease. Otherwise every point of an object has to be defined by mouse click;\r
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.. _viewer_preferences:\r
