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creo4 Drawing Setup option documentation for: lead_trail_zeros            

lead_trail_zeros

Controls the display of leading and trailing zeros in dimensions.
Default and Available Settings:
std_default* - Displays trailing and leading zeros based on the model unit system. If you set the model units to Metric system, only the leading zeros appear ignoring the trailing zeros. Similarly, if you set the model units to English system, only the trailing zeros appear ignoring the leading zeros.
std_metric - Displays only leading zeros. Trailing zeros are not displayed.
std_english - Displays only trailing zeros. Leading zeros are not displayed.
both - Both leading and trailing zeros are displayed.
 
If the lead_trail_zeros_scope Detail option is set to all, the lead_trail_zeros Detail option controls the display of leading and trailing zeros in dimensions, hole parameters within hole notes, and all floating point parameters on a drawing, including parametric notes, view scale notes, tables, symbols, and cosmetic thread notes.
In case of dual dimensioning, the lead_trail_zeros Detail option controls the use of leading and trailing zeros in both std_english and std_metric standards independently.
o If the units in the dual_dimensioning Detail option are primary[secondary], std_english[std_metric] shows the primary units values with trailing zeros, while the secondary units show values with leading zeros.
o If the units in the dual_dimensioning Detail option are secondary[primary], std_english [std_metric] secondary units show values with trailing zeros, while the primary units show values with leading zeros.
Hole parameters within the hole notes appear with 3 decimals, regardless of the value set for the default_dec_places configuration option. If you want to change the number of decimal places for the hole parameter, type [.n] after the parameter in the Text tab of the Note Properties dialog box. Here, n is the number of decimal places. You can edit the hole parameter values only through the Note Properties dialog box that opens when you select the hole note and click Edit > Value. Alternatively, to edit hole parameter values through the Note Properties dialog box, select the hole note, right-click, and click Edit Value on the shortcut menu.