I'm extruding the faces selected on the screenshot.
With the selection active I press Alt+E (region vertex normal). the result that I'm getting is shown in the animaiton above. The extrude isn't done proportionally at the sides and height or z-axis.
May I know the reason what I'm doing wrong and how to make it extrude all the sides proportionally?
This happens because you haven't applied scale , so to apply scale ,press space bar search for Apply Object Transform , click the option then go at the tool-bar then under the tool-shelf and select scale. then repeat the steps you are doing in your question. Note: you should be in object mode to be able to search for Apply Object Transform.
If I understand correctly what you want to do, then you just need to extrude then confirm the operation immediately before beginning any transform. E then Enter or LMB and then you can use Alt+S to scale along the normals.
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$\begingroup$ thanks for replying u have understood my question correctly and showing correct what i need. but when im doing the same as u have done the question come same its not proportionally scaling whats the reason i dont understand plz do reply $\endgroup$ – atek Oct 6 '16 at 8:42