I'm in with ScreenMark!

Do you have the exact same requirement? i.e. show a mark @ the very center of your screen?

-publicdomain

Yes, Vic, same procedure. The very center.

But Deozaan made me realize that the taskbar can make a difference? However, I have never had the need for the precise vertical spot, merely the horizontal (width) one. So I am GUESSING that the taskbar that Deozaan is mentioning, not is the problem; I was only talking about the spot being too far to the right. I have not even checked if the displayed spot is too high up or what. Edited: I have Taskbar > AutoHide

[Scrivener 3: Don't Use It Until You Read This!](https://blog.reedsy.com/scrivener-3/)

  8)

Scrivener is a robust — and complex — piece of writing software. Intended as a one-stop solution for writers of all skill levels, Scrivener has a wide range of useful features… if you can figure out how to work it.

Pros:

• Powerful app with helpful features for every writing stage
• Flexible interface users can tailor to their needs
• Free templates
• 30 day free trial

Cons:

• Complex to learn
• More expensive than many other writing apps
• Newest version only runs on Mac
• Most users will only use a small handful of the features

For this (April 2019) review, the team at Reedsy has analyzed Scrivener with an aim to provide transparency and context. As a network that has helped authors publish over 10,000 books, we know the different needs authors have and are able to provide context for what features are the most useful, as well as what kind of writers would benefit from them.

If you want to cut straight to the chase and find out if Scrivener is the right writing app for you, we recommend taking our 30-second quiz.

[Ctrl+S]

or the long version:
right-click the page and click Save As...
and overwrite any previous backup

-on each and every page that you post on.