Hi ​@Cole Mefford thanks for reaching out!

You should be able to achieve your goal by following the steps below:

1. Select the line.

2. Click and drag the white endpoint dot.

   

3. Move it slightly until you see it snap to the edge of the shape — it will look like it's magnetically sticking to the same dot.
    

   

    

4. Release when it snaps — this ensures a flush connection with no visible gap.

Let me know if it’s still giving you trouble and I’d be happy to walk you through it further!

​@Cole Mefford I can confirm that you are doing nothing wrong and that there are definitely inconsistencies between various shape pack objects. For example, the arrow joins the decision shape at different locations:

I’d recommend that you leave your feedback for the diagramming product team in the form of a Wish List idea post by following the guidelines here: Wish List: Everything You Need to Know.

If you do create a Wish List Idea post, I would also recommend that you post a link to it back here, so that future readers of this post can quickly get to and vote for your Idea.

HI ​@Cole Mefford 

OOOPS - Just saw an answer came in above - I need to refresh my browser more often! FWIW :-)

I think the posts above - although well-meaning - have missed your point. You are CORRECT - when using the decision shape that is part of the “Flowchart” collection of shapes, the arrow WILL NOT TOUCH THE SHAPE. Here is what it looks like:

The anchor points (little white circles) are not on the shape itself but just outside the shape.

I think the only workaround I can see is for you to use a decision diamond from a different set of shapes, for example the BPMN gateway brings the arrow a bit closer to the diamond:

But the good old “diamond” in the “Basic Shapes” -- as shown above -- will bring it perfectly into contact.

Hope this helps!