Add a Figure Part in the Parts Panel

Open the Drawing Tool and expand the Parts Panel in the left-hand sidebar.
Scroll to the figure list where you want to add a figure part.
Click the Add Figure Part control provided where a figure part has not yet been identified.
A figure part will be created in that figure list, with a field allowing you to enter a part name.

Note that for manual numbering, a default number will be populated, and may be changed by typing the desired number in the part number field.
Add your figure part to the drawing canvas.

By default, your figure part will be placed as a numbered, arched arrow pointing down and to the left.

Convert a Part to a Figure Part

Open the Drawing Tool and expand the Parts Panel in the left-hand sidebar.
Create or locate the part you want to set as your top-level or figure-level, #00 numbered part in the Parts Panel.
If necessary, reorder that part to be the first part in its figure list.
Click the part number to bring up the Change Part Number menu.
Select the "#00 (Figure Part)" option (where # is the number of the figure the part is listed for).

Note that this option is ONLY displayed for the first part in a figure's list.
Your part will labeled (FP) as a figure part and, for autonumbered figures, renumbered as #00.
Add your figure part to the drawing canvas.

By default, your figure part will be placed as a numbered, arched arrow pointing down and to the left.

Rowan Terminology

"Figure part" is how Rowan Patents refers to the numbered drawing element used to indicate the illustrated item or concept as a whole. It is also called a reference number, a reference number part, a figure reference number, a figure reference number part, a figure number, a figure number part, an overall part, a parent part, a figure-level part, a top-level part, an 00 part, an X00 part, a #00 part, a 100 part, 200, 300, 400, 500, 600, 700,... etc.