Pin 1 polarity markings generally includea Dot, Circle, Chamfer and Bar. 

Indicators scale themselves to thepart size within user defined in combination with or hard-coded minimum and maximumlimits.

The Silkscreen Dot diameter isequal to the lesser of the ordinary pad length or width, not smaller than thesilkscreen polarity Marker minimum, nor greater than the Marker maximum.

An additional silkscreen option toAutogenerate a Pin 1 Indicator Line is available for certain parts whereit can be practically applied. In such cases an extension is applied to thesilkscreen outline near the pin one location.

The Assembly Dot or Circlediameter is equal to 1/2 the lesser of body length or width, not less than theassembly circle/dot minimum nor greater than maximum limits.

The assembly outline chamfer isequal to 1/3 the lesser of body length or width, not greater than 1.00 mm. 

Silkscreen Dot with an Assembly Dotand Circle:

The Chamfer is equal to 1/3the lesser of body dimension and not to exceed a maximum of 1.00 mm. 

Example:if the minimum body dimension is 1.60 mm, the chamfer size will be 1/3 less or 0.53mm.

Silkscreen Dot with an AssemblyChamfer and a Silkscreen Pin 1 Indicator Line:

The assembly polarity bar is only an option for two pin polarized part types. Bar width is equal to the lesser of 1 mm or 1/6 the body width. The assembly polarity bar is applied instead the chamfer, dot or circle its option is checked.

Silkscreen Dot with an AssemblyPolarity Bar :

You select the type of assembly polarity marking and it will be applied to all your footprint patterns. 

This will add consistency to your PCB library assembly polarity markings.