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I'm just starting out with Blender. Consider this model (mind the selected vertices):

Model_1

The tutorial I'm following, suggest that we use the Edge->Edge Slide tool to move those vertices closer to the middle vertices.

I looked at the Blender documentation, and the Edge Slide is used to:

Slide one or more edges across adjacent faces with a few restrictions involving the selection of edges (i.e. the selection must define a valid loop)

So far so good. But then I realised I can also do this by changing my Transformation orientation from "Global" to "Normal", where I'm allowed to move the vertices orthogonally to their normals, i.e.,

Global_To_Normal

I'm new to Blender, so I don't know if there is any difference between one way or the other. I tried looking for an answer on Google, but couldn't find anything.

In case those two solutions are the same (Edge Slide vs Tangential Translation), why is there an Edge Slide tool?

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Yes, they do work differently. If you look at the vertices from the top down, you can see that with Edge Slide the vertices move in the direction of the connecting edges. In Normal mode, moving on the vertex tangent does not stay true to the edge path necessarily.

enter image description here

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  • $\begingroup$ Good answer! I'm just starting out, thanks for the help :) $\endgroup$
    – Jose Lopez Garcia
    Commented Jul 17, 2016 at 11:21
  • $\begingroup$ By the way, how did you create the .gif? So that I can make better questions in the future. Thanks :) $\endgroup$
    – Jose Lopez Garcia
    Commented Jul 17, 2016 at 18:52
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    $\begingroup$ cockos.com/licecap $\endgroup$
    – Todd McIntosh
    Commented Jul 17, 2016 at 18:59

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