When I drag my mouse through a ruler to create a new guide, I want this guide to move pixel by pixel so that when I leave it, it will have snapped to a side of a pixel instead of staying in the middle.
How can I achieve this?
You need to be at 500% zoom or higher and then hold Shift+Mouse Button to have your guides snap to the pixel grid.
Otherwise, by default it'll snap to:
However, if you set your grid to every pixel, then it should snap to the pixel at 100% zoom or greater, even if
Grid isn't enabled. At zooms less than 100%, you'll need
Grid as well as have the grid enabled.
But I usually just use the rectangular marquee to mark out the positions where I want my guides to snap to. This avoids having to zoom in or having to change my grid settings.
What definitively worked for me was the following in Adobe Photoshop CS6:
Units & Rulers.
Also when you select View > New Guide and specify a vertical position does this snap correctly?
Sorry if this is duplicating previous suggestions.
You can hold Shift while dragging., at least in Windows.