The assembly pin 1 polarity markingsinclude a Dot, Circle, Chamfer and Bar. 

Polarity indicators scalethemselves to the part size within defined user or hard-coded minimum and maximumlimits.

The dot and circle sizesare equal to 1/2 the lesser of body length or width, not to exceed the circle/dotminimum and maximum limits.

Here are the Options for settingthe minimum & maximum assembly polarity Circle/Dot sizes.

The Circle/Dot sizes automaticallyscale per the minimum body dimension.

Here is a sample of an Assembly PolarityCircle:

Here is a sample of an Assembly PolarityCircle:

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.

Here is a sample of an Assembly PolarityChamfer:

The Polarity Bar is equalto 1/6 the package body width, not less than 0.25 mm or more than 1mm max. ThePolarity Bar is limited to polarized 2-pin packages including Capacitors,Diodes, LEDs and Antennas.

Here is a sample of an Assembly Polarity 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. 

Question: How does the silkscreen spacing option considerpads are too close?

Example of a trimming rule: the Calculator trims padsizes for you when they fail to meet the specifications in Rules.  Thedefault values we use are all considered best industry practice.

Note: pad clearances are not guaranteed for FP Designer footprintsand there are no warnings.

The clearance of the silkscreen to the body and any pads isset in the Drafting > Silkscreen options. The silkscreen isautomatically trimmed, if required, to meet these values.

There is a hard-coded minimum silkscreen line length of 3silkscreen line widths.  Any silkscreen line segment lessthan this length is removed to avoid the appearance of ‘specks’ on a PCB.

Here is a 0603 chip capacitor that has enough pad-to-padspacing to allow a silkscreen line. This silkscreen outline length exceeds 3line widths.

Here is a 0603 chip capacitor that violates the pad-to-padspacing to allow a silkscreen line. The silkscreen outline wraps around thepads and the courtyard outline is pushed out to include the expanded silkscreenoutline.

You have options to turn off the silkscreen outline if thepattern is too small to create one.

You can also turn off the courtyard excess for including thesilkscreen outline.