TL;DR
One or two keyboard shortcuts to quickly zoom in or out on the map.What ?
You press a keyboard shortcut and you are quickly zoomed in or out (instantly or over 100 ms).For example, MMB (middle mouse button) doesn't seem to have any function in the map/world right now. So clicking the mouse wheel could be a candidate for this feature.
It would work kind of like the F9 / Ctrl+F9 shortcut, but much faster.
It would zoom you to one of two hardcoded zoom levels: one really close (enough to be able to see radar video feed, maybe even one or two notches closer in), and one far out (where you could see your whole factory and then some for a typical midgame base). If you're not already at the far out zoom level it will zoom you to it when pressing the shortcut. Otherwise it will zoom to the close up zoom level.
Why ?
Is it just me or are we zooming in and out a lot in this game, especially midgame and after? Like I'm often wanting to check on things (why is science slow, do furnaces have enough fuel, is my outpost okay, how far is u235 mining progress, is light/heavy oil clogging, dude where is my car?), but they're in different places, so I zoom out to be able to see all points of interest, then zoom in to see the radar video feed (often in reverse order since I like to be able to see everything when I open the map instead of being zoomed in on whatever random location I last looked at).Sometimes I find it slightly frustrating the wait while flicking my mousewheel 3 to 5 times. One of Factorio's defining assets, the scale, is working against itself in this way. Now maybe I should increase my mouse wheel sensitivity, but it works fine for me everywhere else, so I think a quick-zoom feature could be appropriate.