MODIFY allows you to alter ordinate dimensions using four
different methods: ADD TO, MOVE, ALIGN, REMOVE.

ADD TO - to add additional ordinate dimensions to an
         existing string of ordinate dimensions.

MOVE   - to move, and therefore redimension, existing 
         ordinate dimensions.

ALIGN  - to select a dimension in a string of unaligned
         ordinates for alignment.

REMOVE - to erase ordinates and subordinates.

An ordinate dimension keeps the original specifications
assigned (e.g., alignment), even when modified. Before
modifying any of the existing dimensions, assign the 
desired attributes.

Remember that leader lines are drawn from a base position 
to the text dimension when repositioning or adding 
ordinates.
