creo7 Drawing Setup option documentation for: default_tolerance_display_style 
default_tolerance_display_style
Controls the spacing and vertical justification of tolerance values relative to the nominal dimension according to ASME or ISO drawing standards.
For dimensions set to limits tolerance, this Detail option additionally controls the appearance of limits as in-line (next to each other separated by a dash) or
stacked (one on top of the other). That is, when the value is set to std_asme, limits will appear in-line, and when the value is set to std_iso, limits will appear stacked.
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| This Detail option controls the display style of dimensions when their tolerance mode is
set to anything other than nominal.
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Default and Available Settings:
std_asme* M-^SApplies American Society of Mechanical Engineers
(ASME). Limits appear in-line.
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| For the desired effect, you may need to use an ASME-compliant dimension text
orientation.
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std_iso - Applies International Organization for Standardization (ISO). Limits appear
stacked.
