Hi
 
i want to Adustment of Text hight. So i want to know whats scale factor of while i work in mm plz advice me  

?Are you saying you want your text to be the same height, irrespective of scale on the drawing?You have two choices...1) create a number of different text styles and simply multiply the height of the text from a "base" scale, say 1:100...  so you have TXT100, TXT200, TXT300, TXT500, TXT1000...  If TXT100 text is 20 "high", then TXT200 is 40, TXT300 is 60, TXT500 is 100 and TXT1000 is 200, etc..or2) Create the text on the Layout tab, not model tab...There are pros and cons to both..  We use number 1) above, but I guess it depends on how many different scales you have on your drawings..  Although saying that, we mix it up with some text on the layout tab, but that is for our notes only.HTH