Word2013 How to save a custom document cover page
Step 1th, open the Word2013 document window and create a user-defined cover page.
Step 2nd, switch to the Insert Ribbon, and select the content you want to include in the cover of the Word document (you can include objects such as text, images, graphics, text boxes, and so on). In the page group, click the Cover Page button, and in the Open Cover panel, select the Save selection to cover page gallery option, as shown in Figure 1.
Figure 1 Selecting the Save selection to cover page gallery option
Step 3rd, open the New Building Block dialog box, enter name and description, and other options to keep the default settings and click OK, as shown in Figure 2.
Figure 2 "New building block" dialog box
Step 4th, in the page group, click the Cover Page button to select a new custom cover page in the open cover panel, as shown in Figure 3.