It is called the current slide or active slide.
slides
Each theme determines where the slide number is displayed in the footer.
No, the Power point window is not displayed when the slide show is going on. It is full screen mode and does not show anything.
slide numbers, slide icons, and slide text only
Powerpoint allows you to include presenter's notes that are displayed in the presenter view and in the outline of the slide show but are not displayed on the slides themselves.
What is the box with the dotted or hatch-marked borders that are displayed when you create a new slide known as
star
status bar
Slide count , theme
Placeholder
They can be displayed on a slide so you know which slide you are on while giving a presentation. This can be useful in your planning and also knowing how far through a presentation you are, and how much more there is left to be presented.
Layout, New Slide, Delete Slide, & Duplicate Slide