Non-Native Dsp "Show/Hide Parameter Sliders" Button

The current icon is based on file structure expand/collapse, perfectly reasonable when abstracted. However, the icon is identical to the “move effect in signal chain” icon, thus not visually intuitive.

Perhaps a square like the Windows maximize icon would be appropriate.

Don’t have any third party VSTs installed currently but I thought I remembered it being a downwards arrow for expand and upwards for shrink/hide the parameters. That I think would be suitable even if I am remembering wrong.

Square is already used to bring from minimised back into expanded for native DSPs (and I assume third party too.)