The method is as follows:

1. Insert the first caption. Select the picture, Insert → Quote → Caption, create a new label: enter “picture” and confirm.

2． Insert a figure caption for a second figure or for another document. Since the newly created caption label has been saved to the Word template, there is no need to create a new label. Simply select "Figure" from the label drop-down list.

3． Modify the caption style. Format → Style and Formatting, select Modify in the Caption drop-down command list, and specify font, paragraph and other styles for the caption.