Idea Summary
This is more of how to make APEX better rather than an idea. My request is regarding if developer selects page template as “Left Side Column” then please give an option to collapse or expand it similar to Navigation menu hamburger collapse/expand. This will be very handy to utilize page layout in front end if we have to show report based on left side filters.
Attaching screenshot for reference.

Use Case
What are the use cases in which this idea useful?
Anywhere Left Column page template is used
Preferred Solution (Optional)
How would you implement this idea? If you are not sure, leave blank.