edit functions enable you to manipulate diagrams and make
quick corrections in the following manners:
drawing objects along an edge
parallel lines and arcs
drawing objects to an edge
an object into equal parts
sharp and rounded corners
or reducing a diagram
Drawing Objects Along an Edge
allows you to erase drawing objects along a selected edge
(this technique is often called trimming). When you use
this function, you are prompted to select the drawing object
that is to be used as the cutting edge and then select the
objects that are to be erased along that edge.
Parallel Lines and Arcs
allows you to draw parallel lines, arcs or splines using
previously drawn objects as a reference. This technique
is often called offsetting. To draw an offset parallel line,
you need to select the drawing object to be used as a reference
and then specify the distance and direction of the offset.
A parallel drawing object is drawn at the specified distance.
Drawing Objects to an Edge
allows you to extend lines to a selected drawing object.
Often you need to extend lines to construct a drawing and
to fix any graphical errors. To extend lines, you need to
select an edge to which the lines should extend and then
select the lines to be extended.
an Object into Equal Parts
allows you place dividing marks on a drawing object such
as a line, arc, ellipse or spline. To use this command,
you need to select an object and specify how many divisions
are required. This function places markers at equal distances
on the drawing object.
Sharp and Rounded Corners
allows you to make fine corners of any two lines or arcs.
This technique, often called filleting, is the quickest
way to join the missing corners of lines and arcs. With
this function active, to make a corner all you need to do
is select the lines or arcs that have missing corners. CADD
automatically extends or shortens the selected objects to
form a corner. You can also specify whether you want a sharp
corner or a rounded corner.
allows you to make a chamfered corner between two lines.
It works quite like the fillet command. When you enter the
chamfer command, you are prompted to select the lines that
are to be chamfered and enter a chamfer distance. The chamfer
distance determines the size of the chamfer.
allows you to quickly change the size of diagrams by stretching
lines, arcs, splines, etc. This function is very helpful
to make quick alterations to drawings. To use the stretch
function, you need to select the drawing objects to be stretched
and specify the distance and direction of stretching.
or Reducing Diagrams
allows you to enlarge or reduce diagrams in a convenient
manner. To enlarge or reduce diagrams, you need to select
the objects and enter a scale factor. The scale factor determines
by how much the diagrams are to be reduced or enlarged.
allows you to rotate selected drawing objects to a specified
angle. To rotate, you need to select the drawing objects,
enter a reference point (or base point) and the rotation
angle. The base point acts as a pivot point around which
the objects are rotated. The rotation angle determines by
how much the objects will be rotated and in which direction.
allows you to create mirror images of drawings. This capability
is very useful when you want to draw something that is symmetrical
on both sides. You need to draw only one half of the drawing;
the rest of the drawing can be completed using the mirror
function. To make a mirror image, you need to select the
objects to be mirrored and indicate a mirror axis. The mirror
axis is an imaginary line along which the diagram is mirrored.
to CADD PRIMER for details on all the above topics.