13. Add Gallery , think it as a category or group of images you want to display in your post
14. Select Gallery and upload images. You can upload number of images at once and click Upload images button. All Images will be added to that Gallery. Simple , isn’t it!
26. You can copy and paste the code from slideshare site. If you look at slideshare site there will be a wordpress code snippet for every slideshow. Did you noticed it?
27. Adding Youtube Video is simple. Please make sure to show all Editor buttons by clicking toggle button.