The majority of his actions centered around the same three camera screens, and those exact camera screens were where his camera was centered for almost the entirety of the game. There might be space in between his bases where stuff was going on, and areas on the map where his units were moving through, but he spent a very small portion of time actually looking at those areas simply because he did not need to.
Even if you have separate hotkeys for each of your nexi/hatceries/CC's, efficient use of screen hotkeys will tremendously improve your play in a very small amount of time. Hotkeying the screen with each base centered unlocks a lot of previously wasted motion, focus, and especially time.
The most important resource at your disposal is time, not minerals, not gas, not supply. Edge-scrolling is an enormous drain of this precious resource, and investing time in doing it hampers your ability to tell your story through your actions.
For instance, say you send a worker to your natural to build an expansion, and then send it back to your main to mine. Even with the fastest mouse scrolling sensitivity, you will spend 1-2 seconds of game time edge scrolling. When you edge scroll, you are not actually doing anything. You aren't training units; you aren't adding infrastructure. You're not executing any commands. You are simply wasting time by moving a camera.
1-2 seconds of game time per instance might not sound like a tremendous amount of wasted time, but it certainly adds up. You might commit this error of inefficiency dozens of times throughout a game, potentially adding up to entire minutes of time wasted.
Just a few advantages of making a habit of this practice include:
- 1. More efficient maynarding: Instead of edge-scrolling to the 'From' base, boxing workers, edge-scrolling to the 'To' base, and then finally sending them to mine, you are suddenly happening upon the 'From' base instantly, boxing workers, instantly happening upon the 'To' base, and then executing the mine command. Depending on where your camera was when you decided to execute this sequence of actions, you can effectively cut out 3+ game seconds of wasted time that is more useful spent elsewhere.
2. Responding to drops/harassment: We've all been there. You are chilling, and suddenly you see 2 red blips on the minimap. You either click on the minimap and send your hotkeyed units to assist, or worse, you grab a bunch of shit and then edge-scroll to the location and do your best to fend it off. In this case, the screen hotkeys save you time even if you were previously using the minimap to a-move your units, or to left click the minimap to gain vision of the harassment and then subsequently warp-in units (if you are protoss), or use whatever you have on the spot to defend. These are precious seconds of effective response time that could save workers (you can maynard away much faster as previously mentioned) or structures, as you will be able to get into a position to defend game seconds more quickly.
3. Infrastructure management: If you are in a battle or paying attention elsewhere but know that now is an appropriate time to add tech or addition unit-producing structures, screen hotkeys will allow you to save time in edge-scrolling or spamming multiple keys to center your main (and if you have all your nexi/hatches/CC's on the same hotkey, this won't always land you at your main depending on where your camera was originally), screen hotkeys will allow you to instantly view the area you need to, cutting out game seconds of wasted time. This is also very valuable for actions you cannot do remotely with normal hotkeys, such as chronoboosting and (at least for me when I play zerg) injects. When I play zerg, I find screen hotkeys especially invaluable as they gives you a great amount of control. Backspacing includes a degree of randomness, so it's probable that you will spend time carrying out redundant or entirely vain mechanical actions. Your mouse is also centered after the first inject, so you can inject multiple hatches without even moving your wrist. Baller.
+ Show Spoiler +
Take a minute to look at this screencap:
Note that by hitting the screen hotkey for my main nexus, I am in a position chronoboost 2 forges, a robo, a robo support bay, a twilight, and 10 gateways after a click of a single key, and without wasting any time at all.
If you construct your base so that you have as many important structures as possible on a single screen, your base becomes less of a jumble of randomly placed structures and suddenly appears to have been constructed with some semblance of reason. Of course, you would want to emphasize the parts of your base's layout--depending on the map--to place structures more densely where drop harassment is less common, so placing a great amount of structures on a single screen is not always feasible (On many maps. placing overflow infrastructure at your natural is a smart move, anyway). Either way, you are still cutting out wasted time.
Easier worker counting: It is extremely easy to check the saturation at each of your bases and takes significantly less time if you can queue up the appropriate camera views instantly.
I know former BW players are probably already familiar with the advantages of this technique and (hopefully) use them to their greatest potential, but I personally do not come from a background of seasoned SC gosuness so I had to start from scratch. And it really only a took a day or so before it became second nature. Edge-scrolling between bases suddenly felt extremely clunky and foreign.
How to practice this
Play against the very easy computer a couple of times. Do not let yourself edge-scroll! Disable edge-scrolling in the options if you have to. At the start of the game, set screen hotkeys for your main, natural and 3rd. Once you have started constructing your base structure at each base, center by double tapping the hotkey and overwrite your previous screen hotkey with the new, centralized one. Here's a short VOD of me completing this exercise. For some reason the quality is really low.. sorry in advance
Note: Configure your screen hotkeys in the hotkeys menu before hand and find a setup that is comfortable for you. They are located in the Camera subsection and are Create location 1/Jump to location 1 and so forth. My mouse has a couple extra buttons on it so I use those, but you might find it easier to use the F keys as is standard.