DIM HT (Dimension Height) allows you to enter the text
height to be used for all dimensions created.

The DH: parameter in the Status Window can also be used to
alter this setting.

Enter a new dimension text height value greater than 
0.0005, and press <Enter>. Assign the default value in
parentheses by pressing <Enter>.

Only text entered from this point on take on the new text
height. To change existing text to this new height, use 
the CHANGE and/or UPDATE functions.
