Gender and number are colour coded in grammar capable texts¹ such as KJV, BYZ, ANT, ELZ, WHNU, and TR:

• Masculine is blue.
• Feminine is red.
• Singular is standard weight.
• Plural is bold. 

To display colour coding:

• Select the Passage lookup from the Search menu on the STEP toolbar.  
• Select a grammar capable text  (KJV, BYZ, WHNU, TR, ELZ, ANT) from the Translation menu.
• Select a passage from the Bible Text menu.  
• Select Colour coded grammar from the display menu.

¹A version which is capable of interlinear display (with an I after the name in version menu) can be displayed as a Comparison version with a grammar capable text.  See the example.