Creating 2D Drawings from 3D Data - Inventor 2013 and Inventor LT 2013 Essentials - page 48

FIGURE 2.16 Placing center marks on holes
by simply picking them

Center marks and centerlines have many uses in Inventor. The ability to easily
make and drag-edit the extents of these marks helps you save time cleaning up
the drawing. They can also be used to show linear alignments between holes or
even bolt circles.

1. Make certain that the 2013 Essentials project file is active, and then
open c02-10.idw from the Drawings\Chapter​2 folder.

You can also easily
create a series of
centerlines in an arc
based on a center.

2. Zoom in on the rotated auxiliary view in the upper-left corner.

3. Select the Centerline tool from the Symbols panel of the Annotation tab.

4. Begin by selecting the hole at 12 o'clock of the round face; then click
the holes at 3 o'clock, 6 o'clock, and 9 o'clock, as shown in Figure 2.17.

FIGURE 2.17 As you place the center marks
for the bolt circle, the centerline previews.