If i did understand your question, you may be asking about panning ( the hand tool) you need to zoom in first before start using the space bar, or you can press F key once to start panning with/without zooming
Ok I used to press and hold the space bar and using my mouse or pen, move around any image. without changing the current tool i was using. Now i must press H for hand tool to move around the image. I dont want to do this.