Initial situation
In the participant overview of a course, a defined number of elements are displayed (moodlecourse | participantsperpage) before a page switch function is displayed.
The function for viewing all participants is only displayed below the overview. (For the positioning of the buttons I had written a tracker element in the past: #MDL-83200)

Problem description
Teachers want to execute different functions via the participant overview.
When viewing the persons (from top to bottom), the required elements are selected. At the end of the overview, the “Show all” button is clicked if they have not yet selected all the required persons.
The overview refreshes and no elements are selected.

Solution
It would be good if the selection of the elements could be transferred when the complete list is reloaded.

Technical solution
On a quick look / think, this would be my approach:
The checkboxes of the overview elements have a unique user ID in the id-tag. This could be passed in the URL in order to select them again after reloading.