I use MS PowerPoint to make simple wiring diagrams for our reports. I use lines to represent the wires. The lines (wires) often make 90 degree angles.
Way back when I used PowerPoint 2003, it had a nifty feature called edit points. When I right-clicked on a straight line, I could add a point to the line and then make a right angle (or any angle) in the middle of the line. Was really cool.
Now I’m using PowerPoint 2010. The edit points feature is not there. :mad: (This was also true with PowerPoint 2007.) So now, when I make wires in my wiring diagrams, I make vertical and horizontal lines and manually connect them. It takes a *long *time to do this, and even then it often doesn’t look right. 
So how do I easily make lines w/ right angles in PowerPoint 2007/2010?
Line segments can be straight, elbow, or curved. They can’t have extra points added to them as far as I can tell. Create a line segment, right-click, and choose “Connector Types”>“Elbow Connector” to get a (typically) three segment line that can auto-adjust if it is anchored to the corners of middle of line segments.
Edit Points is under “Drawing Tools”>“Insert Shapes”>“Edit Shape”>“Edit Points”. However this only works with Freeform Shapes. E.g. Create a Rectangle, choose “Drawing Tools”>“Insert Shapes”>“Edit Shape”>“Convert to Freeform”. Then the “Edit Points” is available. You can add and delete points and change the shape of line segments.
Do you also use wrenches as hammers?
Powerpoint is not a drawing program. Is there any reason you don’t use a CAD program (or even something like Dia?)
Hijack/rant warning!
I don’t understand the need for contributors in any forum to pointlessly second-guess tool selection.
Maybe OP has no say in software selection. Maybe the diagram will be integral to a PowerPoint presentation, and installing and learning a completely new tool is massive overkill. Maybe he’s modifying an existing drawing and starting from scratch is also massive overkill.
It’s endemic. Ask a Linux forum a question specific to a particular distro, and you’ll get the useless jeers of someone advocating a different distro. Ask a Windows question, and you run a very real risk of a useless suggestion to run a different OS. (Bonus points if it’s phrased in terms of a no-longer-funny joke step-by-step solution that consists of reformatting the hard drive and installing Linux.)
And I say this as a Linux bigot. It makes me cringe. I actually want to apologize on behalf of non-clueless Linux advocates everywhere.
Anyway. To answer the original question, hopefully usefully:
I’m not using PowerPoint 2010, but this Microsoft Office help topic points to the correct menu selection to edit points in a shape.
This seems to be the same menu structure as the 2007 version of Office I (am forced to) use, and it does basically work the same way as the point-editing context menu of Office 2003. Try it and see.