I m interested in having a feature where I would put my cursor in the top left corner for example and it would show the left Panel as pictured :
Really love ubuntu mate for the past 4 years. Big up <3
Switshed to a 13,5 3:2 framework laptop screen... and need to fite stuf elsewhere on an extra taks bar 
also It always show up by mistake while I am doing other stuf...