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How can I work with parameters in Blender? I tried searching on Google, but I didn't find results.

When I change the parameter on the X and Y axis, it works well, but when I go into Edit mode, I can't see the parameters. And when I extrude, I can't adjust them on the extrusion. How can I work with dimensions and how to make the parameters in real world scale?

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See also… – stacker Aug 5 '14 at 17:08
up vote 3 down vote accepted

First set the Units in the Scene properties to Metric or Imperial. If you are using Imperial, then checking Separate Units can help make it more natural.

When entering in units in Object mode using the Dimensions, watch the scale. You have to apply the scale ( ctrl A > Scale ) before the same measurements will show in edit mode. When the scale of the object is applied (all three field set to 1) then dimensions will work as excepted in edit mode. enter image description here

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How do you have the "scale" transforms in edit mode? – Vladimir Aug 5 '14 at 17:59
And do I have to use the "scale" or "dimensions" for modeling? – Vladimir Aug 5 '14 at 18:02
@Vladimir there is no scale transform box in edit mode, that is one of the reason that the object must be scaled to 1. – David Aug 5 '14 at 18:04
Ok thanks. I meant about the two boxes in the panel - "scale" and "dimension", the second one should be used, right? – Vladimir Aug 5 '14 at 18:09
yes the dimensions are what you will be entering. – David Aug 5 '14 at 18:11

First set your units in the properties window.

In Edit Mode you can use numeric input for transformations two ways:

Using Transform on the numeric tabs.

enter image description here

Or by inputting your parameters using the keyboard.

S to scale, R to rotate, G to grab (move),E to extrude.

For example: to extrude a face 2 units on the Z axis you'd select a face and type EZ2

To scale something in half you'd type S.5

To double the size on the Y axis only you'd type SY2

To rotate 90 degrees in X you'd type RX90

To move minus two units in X and Z you'd type GShiftY2-

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