You can set an attribute to synchronize label annotations and symbols
scaling.
Before you begin:
In a diagram view, create a symbol.
Instantiate a label inside the symbol.
Right-click the label, and then select Properties.
The Properties dialog box appears.
In the Text tab, select the Apply Scale
option.
Click OK.
If you modify the scale of the symbol, you modify the scale of the label
accordingly.
Note:
When the Apply Scale property of a label
annotation is modified, the diagram view, sheet, or symbol representation containing the
annotation is also modified.