AutoCAD Field is a great tool for AutoCAD 2005 or later. Fields are a really nice addition that give you quick access to various types of information via TEXT, MTEXT or an Attribute.
AutoField provides some useful additional AutoCAD fields. Let’s see how to insert the count of the specific INSERT (block reference) as a Field. Then the text of the count will be updated automatically after the block references were deleted or added.
1. Use the Insert menu or right click to choose Insert ->Field.
2. Select “AF Block Count” in the left panel of the Field dialog.
3. Select the block name you want to count. You can select multiple blocks to count their block references.
4. Click OK to insert the field.