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are talking about text styles?
if so enter style on the command line you will see this dialog box.
if you are using Annotative text styles you can leave the text height @ 0'-0"
if not then figure what scale you are printing and make your text height as required ie 1/8"=1'-0" scale you will want your text in model space to = 9" to print in paper space @ 3/32" height