Where is the redo function in Blender? I have had several occasions where I went astray with my Blender work and had to undo my work or start over.  When I undid my work today that took several hours, I went too far.  Oops!  Now I have to redo that work.

I come to Blender from CAD, specifically AutoCAD and Inventor.  Both of those packages have a redo function in them.

I would really like to see one of you smart programmers work on that.  Or, tell me that it is available and I just don't see it.
There is!:

Ctrl+Z is Undo

Ctrl+Shift+Z is Redo.

And Ctrl+Alt+Z is to show and select Undo History.