How do you add cms to a wall?

SketchUp
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1

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image1920×1080 334 KB

2

What do you mean exactly? What do you want to add? Height? Thickness? What? Your screen shot doesn’t tell us what you are trying to accomplish.

3

I want to add height to the lower wall and if I do it how I did the top increase at 26º not at 90º

4

I want to add height to this walls

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image1920×1080 292 KB

5

Select the top face of the wall and use Move to move it straight up.
height

6

I did that always but this time didnt increase in 90º angle, finally I added “height” from bottom to underground and move all the sketch to 0x0y0z. Thanks.