Angular drawing dimension of 180 degrees

[Anonymous]

I'm trying to portray a seam on a boiler shell as being at 225° from my base angle. Inventor won't let me do this, it snaps back as soon as it gets to 180° and shows 135° instead. How can I force it to show 225°?

One screenshot is marked up to show how I want the dimension to appear. The other shows how Inventor insists on doing it.

[JDMather]

Before I attach example here - what version of Inventor are you using?

[Anonymous]

Inventor Professional 2016.

[Anonymous · Accepted solution]

1. Click Dimension
2. Click the two lines
3. Move your mouse so that it is displaying the preview of what your dimension will be if you were to left click and accept the 135 deg dimension.
4. Right-Click and select "Opposite Angle"
5. Left-Click to accept the angle

Cheers.

[Anonymous]

Perfect, thank you!