Most PDF readers have a "Full Screen" or "Presentation" mode, which allows sharing the content without the distraction of other computer icons and controls appearing on-screen. As an example, the steps for Adobe Acrobat Reader are shown below; similar adjustments can usually be made in other PDF Readers. These adjustments can be made offline, and shared in "Full Screen" or "Presentation" mode later. To move back and forward through the pages of the program, use the up and down arrow keys.
The document as initially opened with lots of distracting stuff around it.
Select "Full Screen" or "Presentation" mode from the View Menu.
In some cases, a black band may remain at either side of the content.
If black bands appear, remove them by changing the background colour to be similar to the background colour of the program content.
Full screen view ready to share via Zoom, etc.