1, right-click on the picture and choose Add Text.
2, if the first method can not be added in the appropriate location, you have to insert a text box. Methods are as follows:
(1) Select the Insert menu, find the text box tool.
(2) Enter the number.
(3) Then right-click and edit the picture: fill - no color; border - no.
(4) Then move to the right position and set the picture around the way: floating above the text.