• Select the Callout command

• Make sure that the Callout text fields are empty. Select the Symbols and Values icon.

     Note: The Leader option is turned off for this callout.

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• Locate the Centerline symbol under the Symbols > Other Symbols header, in the Symbols and Values dialog.

• Once located, hit the Select button. Notice the preview in the Preview box. Click OK, to accept this symbol.

• The symbol is now in the callout dialog.

• Click the Text and Leader tab. Set the Font size to a desired size, e.g. 10.

• Click OK, and then place the callout on to the sheet, as shown below.