How to turn off minimap in Expression Builder editor?

Question

I'm using the Azure Data Factory portal online. When I go to edit an expression in the expression builder I want to make my browser window more narrow to have more screen space but the minimap on the right of the editor area will not turn off. I right click it, click "minimap" and it stays on.

Here's the right click menu when I right click on the minimap.

"Minimap" always remains checked even if I click it.

I did a search of this forum but could not find an answer. The "Answer my question" button also did not provide any answer at all. How do I turn off this minimap?