About-Specifying-a-Point-Relative-to-an-Existing-Point

About Specifying a Point Relative to an Existing Point

About Specifying a Point Relative to an Existing Point

You can specify a point that is located a specified distance and direction from a
temporary point, or a series of temporary points.

Using the Tracking Method

You can use the tracking method whenever you are prompted for a point. Tracking uses
the pointing device to specify a point by offsetting vertically and horizontally from
a series of temporary points. When you start tracking and specify an initial reference
point, the next reference point is constrained to a path that extends vertically or
horizontally from that point. The direction of the offset is indicated by the rubber-band
line. You change the direction of the offset by moving the cursor through the reference
point. You can track as many points as you need. Typically, you use tracking in combination
with object snaps or direct distance entry.

For example, you can use tracking to find the center point of a rectangle without
using construction lines. Start tracking, and specify the midpoint of a horizontal
line. Drag the cursor vertically and specify the midpoint of a vertical line (2).
Press Enter to accept the point (3) at the center of the rectangle.

Using the From Method

Similar to the tracking method, you can establish a temporary reference point as a
base point for offsetting subsequent points. The From command modifier establishes
a temporary reference point as a base point for offsetting subsequent points, and
usually is used in combination with object snaps. The From method does not constrain
the cursor to the horizontal and vertical directions.

Dimension Input With Dynamic Tooltips

When dimension input is turned on for dynamic tooltips, the tooltip displays distance
and angle values when a command prompts you for a second point. The values in the
dimension tooltips change as you move the cursor. Press Tab to move to the value that
you want to change. Dimensional input is available for the ARC, CIRCLE, ELLIPSE, LINE,
and PLINE commands.

When you use grips to edit an object, the dimension input tooltip can display the
following information:

  • Original length
  • A length that updates as you move the grip
  • The change in the length
  • Angle
  • The change in the angle as you move the grip
  • The radius of an arc

If this is too much information, use the dimension input settings to display only
the information that you want to see.

When you use grips to stretch objects or when you create new objects, dimension input
displays only acute angles: all angles are displayed as 180 degrees or less. Thus,
an angle of 270 degrees is displayed as 90 degrees regardless of the ANGDIR system
variable setting. Angles specified when creating new objects rely on the cursor location
to determine the positive angle direction.

Learning AutoCad

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