@gaieus said:

Hi Pepe,

It's probably yopur computer1s regional (non-English) settings.

On English systems, you type 860.0,1900.0 but on other systems (where the comma is used as a decimal separator), you type 860,0;1900,0 (note that I added the decimals just in order that you see the full difference)

As for the difference between the two versions, see here: http://www.sketchup.com/intl/en/product/whygopro.html

For quite a long time you can proceed learning without the need of the Pro.

Thanks, this was the answear!

Hi,

I'm new with Sketchup. First I downladed the Free version to try the software. There are many guides in youtube how to do things with Ketchup. Are those most for the free version? And what are the differencies with these two versions in practise. First I try to make precise retangle with 860 x 1900 mm. I follow the guide in Youtube (Precise Drawing in SketchUp), and gues what, I can't do it by my self! I draw a retangle and before I give up the cursor I write the dimensions and press return - BUT nothing happend ? What I have done wrong? I'm using Mac.