How to insert page numbers in a WPS presentation:
First Open the WPS demo software on your computer and create a new blank document, as shown in the following illustration.
Next click on the "Insert" button in the top menu bar and find the "header and footer" option below, as shown in the following figure.
Click the header and Footer option to eject the Header and Footer dialog window, where you can see the slide numbering options, as shown in the following illustration.
Check the slide numbering options, and then click the "Apply All" button on the top right, click on the Full Application button to add page number to all the slides in the PPT, if you click the "Apply" button, will only add page numbers to the selected slides, this requires attention.
After you click the Apply All button, you can see that the selected slides successfully insert the page number, and then create a new slide with the same page number on the new slide, as shown in the following figure.
When you click the F5 shortcut to play the slide, you can see the slide number clearly below the slide, and the slide number is added successfully, as shown in the following figure.