1, open PowerPoint, click the Show, click the right mouse button, in the Open shortcut menu, select the "Pointer Options" command, select "Ballpoint pen"/"highlighter."
2, if you are not interested in the color of the pen, you can also right-click on the Slide pop-up shortcut menu select "Pointer Options" command, and then select "Ink Color", choose your favorite color.
3, so you can make a mark on the PPT. So that the interpretation of ppt more deeply rooted.
4, but if you want to revert to the original PPT slide, you can select the "Erase All Ink on slide" command in the "Pointer Options" menu on the right mouse button. These tags do not modify the contents of the slide itself