CHAIN allows you to create chain dimensioning with a
maximum of 50 reference points.

Select the axis for the chain dimensions by choosing from
the following options:

HORIZTL - to display chain dimensions horizontally between
          the selected points.

VERTICL - to display chain dimensions vertically between 
          the selected points.

PARALEL - to display chain dimensioning parallel to the
          general direction of the selected points, 
          according to the indicated axis position. 
          Indicate the axis you want as your dimension
          axis by selecting two positions.

Select a position to indicate the first witness line 
height. This position is used to calculate the witness and
leader lines for the first dimension, but all dimensions
in the chain are set to this same height. Two temporary 
witness lines are displayed on the screen to indicate the
boundaries of the dimension to be processed.

Indicate the dimension text position. This position
determines the run, not the rise (or height) of the
placement of the dimension text. The point you select is
projected to the current witness line height.

The dimension is displayed along with its leader lines.

Indicate whether or not you want to accept the dimensions.
If you choose NO, the dimension and its leader lines are
deleted and the temporary witness lines remain highlighted
until a new dimension text position is indicated. If you
choose YES, the dimension is accepted and is displayed 
along with its witness lines.

After each dimension is processed, new temporary witness
lines are displayed to indicate the next dimension to be
processed.

Continue until all of the dimensions are processed.
