AutoCAD 2018 and Inventor 2018 Tutorial By Tutorial Books (www.engbookspdf.com)

Part 1: AutoCAD Basics
Select the circles from the drawing to apply
the center mark to them.
Click the Symbols and Arrows tab and set
Arrow size to 3 and Center Marks to 3.
Select the Line option in the Center marks
section.
Notice the different options in this tab. The options
in this tab are used to change the appearance of the
arrows and symbols. Also, you can set the
appearance of the center marks and centrelines of
circles and arcs.
On the ribbon, click Annotate >
Dimensions > Dimension .
Make sure that the Object Snap icon is
turned on the status bar.
Select the lower right corner of the drawing.
Select the endpoint of the center mark of the
small circle; the dimension is attached to the
pointer.
Move the pointer vertical downwards and
position the dimension, as shown below.
Click OK to accept the settings.
Click Set Current on the Dimension Style
Manager dialog; the Mechanical dimension
style will be set as current.
Click Close to close the dialog.
On the Annotate tab of the ribbon, click
Select the Baseline option from the
command line.
Centerlines > Center Mark .
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