Vit,
you can se default font and its height in drawing options file. I am not sure if it is possible to set vertical justification.
The following information is valid for Creo Parametric 2.0.
Open a drawing and follow this procedure:
File > Prepare > Drawing Properties > click change in Detail Options line
Now you can set drawing options for active drawing.
Also you can save drawing options to the file (.dtl extension, no spaces in name).
In config.pro you can set:
DRAWING_SETUP_FILE full_path_to_your_DTL_file
When you restart Creo and create new emty drawing, then Creo will copy the contents of DTL file into the drawing.
Martin Hanak