Adding and removing corners
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The selection markers of objects always have the same size independent of the zoom step. The minimal size is two pixels.
For more information on zooming elements refer to chapter Editor / Toolbars Pictures. Pictures
Adding and removing corners in polylines / polygons / tubes:
If the mouse cursor is on the line of a polyobject, the right mouse button opens the context menu. With the entry
Add a corner to the selected element a
new corner is added at the current position. As an alternative the
Ctrl and Shift can be
pressed simultaneously. On the line of a polyobject the mouse
cursor then changes to an arrow with a + and a corner can be added
with a mouse click.
If the mouse cursor is on a corner of a polyobject, after a right mouseclick the entry
in the selected element is available in the context menu.
Thus the corner is deleted. As an alternative the keys
Ctrl and Shift can be pressed
simultaneously. On a corner of a polyobject the mouse cursor now
becomes an arrow with a - and the corner can be removed with a