Using Dynamic Blocks and Tables - AutoCAD 2011 and AutoCAD LT 2011: No Experience Required - page 447

line also appears at the command prompt attached to the cursor. To
accept the default value for this gridline, press ↵ .
7. Pressing ↵ inserts the grid symbol at the endpoint of the leftmost
vertical gridline (see Figure 9.9).
Although you defined the GRID-V block at a much smaller scale, notice
how it inserts at the correct scale. Just as text does, an Annotative Block
sizes itself based on the current annotation scale when you insert it.
FiGuRE 9.8 The command prompt shows the values for the Prompt
and Default options specified.
FiGuRE 9.9 The first grid symbol block is inserted.